Implement code generation of namespaces and add mangling tests.

llvm-svn: 68170
diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index 01b8d02..4fbacdc 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -324,7 +324,8 @@
   void EmitGlobalVarDefinition(const VarDecl *D);
   void EmitAliasDefinition(const ValueDecl *D);
   void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
-
+  void EmitNamespace(const NamespaceDecl *D);
+  
   // FIXME: Hardcoding priority here is gross.
   void AddGlobalCtor(llvm::Function * Ctor, int Priority=65535);
   void AddGlobalDtor(llvm::Function * Dtor, int Priority=65535);