Add semantic checks for order of qualification and repetition within a class of qualifiers.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22145 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/420.vert

@@ -0,0 +1,13 @@
+#version 420 core
+
+varying vec2 v2;               // ERROR, varying reserved
+in vec4 bad[10];
+highp in vec4 badorder;
+out invariant vec4 badorder2;
+in centroid vec4 badorder4;    // ERROR, no centroid input to vertex stage
+out flat vec4 badorder3;
+void bar(in const float a);
+void bar2(highp in float b);
+smooth flat out vec4 rep;      // ERROR, replicating interpolation qualification
+centroid sample out vec4 rep2; // ERROR, replicating auxiliary qualification
+in uniform vec4 rep3;          // ERROR, replicating storage qualification