Add clang:: qualifier back to Module

Apparently this was required by some compilers.

llvm-svn: 206202

clang/include/clang/Frontend/FrontendActions.h

@@ -93,7 +93,7 @@ public:
 };
 
 class GenerateModuleAction : public ASTFrontendAction {
-  Module *Module;
+  clang::Module *Module;
   const FileEntry *ModuleMapForUniquing;
   bool IsSystem;