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/300.vert

@@ -168,3 +168,7 @@ int Bfoo;
 layout(std140) Binst;    // ERROR
 layout(std140) Bblock;   // ERROR
 layout(std140) Bfoo;     // ERROR
+
+struct SNA {
+    int a[];             // ERROR
+};