Add productions/data for about 14 qualifiers (versions 1.2 through 4.3). Fixed some case issues for rect/array keywords.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@20742 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/120.vert

@@ -0,0 +1,18 @@
+#version 120
+
+in vec4 i;
+out vec4 o;
+
+attribute vec2 attv2;
+attribute vec4 attv4;
+uniform sampler2D s2D;
+invariant varying vec2 centTexCoord;
+invariant gl_Position;
+
+centroid centroid foo;
+
+void main()
+{
+    centTexCoord = attv2; 
+    gl_Position = attv4;
+}