Add geometry-shader stream, invocations, max_vertices, lines, triangles, etc. layout qualifiers, and their default/inheritance behaviors, and some other misc. geometry shader features. (Geometry shaders are not yet done though.)

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@23679 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/baseResults/410.geom.out

@@ -1,10 +1,14 @@
 Warning, version 410 is not yet complete; some version-specific features are present, but many are missing.
+invocations = 0
+max_vertices = 0
+input primitive = none
+output primitive = none
 0:? Sequence
 0:3  Function Definition: main( (void)
 0:3    Function Parameters: 
 0:5    Sequence
 0:5      move second child to first child (int)
-0:5        'gl_ViewportIndex' (out int)
+0:5        'gl_ViewportIndex' (layout(stream=0 ) out int)
 0:5        Constant:
 0:5          7 (const int)
 0:?   Linker Objects