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

glslang/MachineIndependent/ScanContext.h

@@ -64,7 +64,7 @@ protected:
     int precisionKeyword();
     int matNxM();
     int dMat();
-    int firstGenerationImage();
+    int firstGenerationImage(bool inEs310);
     int secondGenerationImage();
 
     TParseContext& parseContext;