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/atomic_uint.frag

@@ -9,7 +9,8 @@ uint func(atomic_uint c)
 
 uint func2(out atomic_uint c) // ERROR
 {
-    return counter;
+    return counter;           // ERROR, type mismatch
+    return atomicCounter(counter);
 }
 
 void main()