Turn on ESSL 3.1 for most features:

- images: load/store, memory qualifiers
 - buffer blocks
 - compute shaders
 - atomic counters
 - texture gather
 - SSO
 - uniform locations
 - all the numeric-based version # comparisons


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@27710 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/310.vert

@@ -0,0 +1,10 @@
+#version 310 es
+
+shared vec4 s;   // ERROR
+layout(local_size_x = 2) out;  // ERROR
+buffer vec4 v;  // ERROR
+
+layout(location = 2) uniform mat4 x;
+layout(location = 3) uniform mat4 y;
+layout(location = 2) out mat4 xi;
+layout(location = 3) out mat4 yi;  // ERROR, locations conflict with xi