Put all glslang internals (but not the external interface) into the glslang namespace.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22882 e7fa87d3-cd2b-0410-9028-fcbf551c1848

glslang/MachineIndependent/Versions.cpp

@@ -44,6 +44,8 @@
 
 #include "ParseHelper.h"
 
+namespace glslang {
+
 const char* StageName[EShLangCount] = {
     "vertex",
     "tessellation control",
@@ -164,3 +166,5 @@ void TParseContext::doubleCheck(TSourceLoc loc, const char* op)
     profileRequires(loc, ECoreProfile, 400, 0, op);
     profileRequires(loc, ECompatibilityProfile, 400, 0, op);
 }
+
+} // end namespace glslang