Block/structure fixes: Merge qualifiers with multiple declarators, handle arrays of blocks, more semantic checks for what's allowed.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21883 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/300block.frag

@@ -0,0 +1,38 @@
+#version 300 es
+
+struct S {
+    vec4 u;
+    uvec4 v;
+    isampler3D sampler;
+    vec3 w;
+    struct T1 {           // ERROR
+        int a;
+    } t;
+};
+
+uniform S s;
+
+uniform fooBlock {
+    uvec4 bv;
+    mat2 bm2;
+    isampler2D sampler;   // ERROR
+    struct T2 {           // ERROR
+        int a;
+    } t;
+    S fbs;
+};
+
+uniform barBlock {
+    uvec4 nbv;
+    int ni;
+} inst;
+
+uniform barBlockArray {
+    uvec4 nbv;
+    int ni;
+} insts[4];
+
+void main()
+{
+    texture(s.sampler, vec3(inst.ni, bv.y, insts[2].nbv.z));
+}

Test/testlist

@@ -27,6 +27,7 @@ comment.frag
 300layout.vert
 300layout.frag
 300operations.frag
+300block.frag
 330.frag
 330comp.frag
 constErrors.frag