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

OGLCompilersDLL/InitializeDll.cpp

@@ -41,6 +41,8 @@
 
 #include "Public/ShaderLang.h"
 
+namespace glslang {
+
 OS_TLSIndex ThreadInitializeIndex = OS_INVALID_TLS_INDEX;
 
 bool InitProcess()
@@ -144,3 +146,5 @@ bool DetachProcess()
 
     return success;
 }
+
+} // end namespace glslang