Track which extensions were enabled or required, in the intermediate representation, for reflection of the consumer.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@26155 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/baseResults/330comp.frag.out

@@ -1,6 +1,7 @@
 330comp.frag
 Warning, version 330 is not yet complete; some version-specific features are present, but many are missing.
 
+Shader version: 330
 0:? Sequence
 0:8  Function Definition: main( (void)
 0:8    Function Parameters: 
@@ -26,4 +27,5 @@ Linked fragment stage:
 
 ERROR: Linking fragment stage: Cannot use both gl_FragColor and gl_FragData
 
+Shader version: 330