Initial implementation of layout qualifiers. More to come after uniform blocks are in place.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21078 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/300layout.frag

@@ -0,0 +1,29 @@
+#version 300 es
+
+in vec4 pos;
+in vec4 color;
+
+layout(location = 7) out vec4 c;
+layout(location = 3) out vec4 p;
+
+//layout(std140) uniform Transform { // layout of this block is std140
+//    mat4 M1; // row_major
+//    layout(column_major) mat4 M2; // column major
+//    mat3 N1; // row_major
+//};
+//
+//uniform T2 { // layout of this block is shared
+//...
+//};
+//
+//layout(column_major) uniform T3 { // shared and column_major
+//    mat4 M3; // column_major
+//    layout(row_major) mat4 m4; // row major
+//    mat3 N2; // column_major
+//};
+
+void main()
+{
+    c = color;
+    p = pos;
+}