GLSL: Correct missing "not" from error message about non writeonly images.

Test/baseResults/310.comp.out

@@ -16,7 +16,7 @@ ERROR: 0:47: 'local_size' : can only apply to 'in'
 ERROR: 0:61: 'assign' :  l-value required "ro" (can't modify a readonly buffer)
 ERROR: 0:66: 'buffer' : buffers can be declared only as blocks 
 ERROR: 0:68: 'sampler/image' : type requires declaration of default precision qualifier 
-ERROR: 0:76: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:76: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:81: 'sampler/image' : type requires declaration of default precision qualifier 
 ERROR: 0:82: 'sampler/image' : type requires declaration of default precision qualifier 
 ERROR: 0:87: 'imageAtomicCompSwap' : required extension not requested: GL_OES_shader_image_atomic
@@ -54,12 +54,12 @@ ERROR: 0:171: 'samplerCubeArray' : Reserved word.
 ERROR: 0:171: 'sampler/image' : type requires declaration of default precision qualifier 
 ERROR: 0:172: 'iimage2DRect' : Reserved word. 
 ERROR: 0:172: 'sampler/image' : type requires declaration of default precision qualifier 
-ERROR: 0:172: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:172: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:173: 'image2DMS' : Reserved word. 
-ERROR: 0:173: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:173: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:174: 'uimage2DMSArray' : Reserved word. 
 ERROR: 0:174: 'sampler/image' : type requires declaration of default precision qualifier 
-ERROR: 0:174: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:174: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:181: 'rgba32f' : format requires readonly or writeonly memory qualifier 
 ERROR: 0:182: 'rgba8i' : format requires readonly or writeonly memory qualifier 
 ERROR: 0:183: 'rgba16ui' : format requires readonly or writeonly memory qualifier 

Test/baseResults/310.frag.out

@@ -18,13 +18,13 @@ ERROR: 0:44: 'texel offset' : value is out of range: [gl_MinProgramTexelOffset,
 ERROR: 0:45: 'texel offset' : value is out of range: [gl_MinProgramTexelOffset, gl_MaxProgramTexelOffset]
 ERROR: 0:45: 'texel offset' : value is out of range: [gl_MinProgramTexelOffset, gl_MaxProgramTexelOffset]
 ERROR: 0:66: 'sampler/image' : type requires declaration of default precision qualifier 
-ERROR: 0:66: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:66: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:67: 'sampler/image' : type requires declaration of default precision qualifier 
-ERROR: 0:67: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:67: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:68: 'sampler/image' : type requires declaration of default precision qualifier 
-ERROR: 0:68: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:68: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:69: 'sampler/image' : type requires declaration of default precision qualifier 
-ERROR: 0:69: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:69: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:73: 'binding' : requires block, or sampler/image, or atomic-counter type 
 ERROR: 0:77: 'location' : location is too large 
 ERROR: 0:81: 'location' : too large for fragment output 
@@ -35,7 +35,7 @@ ERROR: 0:83: 'layout-id value' : cannot be negative
 ERROR: 0:96: 'sampler/image' : type requires declaration of default precision qualifier 
 ERROR: 0:110: 'out' : cannot be bool 
 ERROR: 0:111: 'image2D' : sampler/image types can only be used in uniform variables or function parameters: imageOut
-ERROR: 0:111: 'image variables declared 'writeonly' without a format layout qualifier' : not supported with this profile: es
+ERROR: 0:111: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported with this profile: es
 ERROR: 0:112: 'out' : cannot be a matrix 
 ERROR: 0:114: 'in' : cannot be bool 
 ERROR: 0:115: 'sampler2D' : sampler/image types can only be used in uniform variables or function parameters: ino

Test/baseResults/420.vert.out

@@ -32,7 +32,7 @@ ERROR: 0:85: '' : vertex input cannot be further qualified
 ERROR: 0:86: 'patch' : not supported in this stage: vertex
 ERROR: 0:100: '=' : global const initializers must be constant ' const int'
 ERROR: 0:101: '' : array size must be a constant integer expression 
-ERROR: 0:107: 'image variables declared 'writeonly' without a format layout qualifier' : not supported for this version or the enabled extensions 
+ERROR: 0:107: 'image variables not declared 'writeonly' and without a format layout qualifier' : not supported for this version or the enabled extensions 
 ERROR: 0:114: 'imageAtomicMin' : only supported on image with format r32i or r32ui 
 ERROR: 0:115: 'imageAtomicMax' : no matching overloaded function found 
 ERROR: 0:119: 'writeonly' : argument cannot drop memory qualifier when passed to formal parameter