Add a -cc1-level option -fmodule-name=<name>, which will be used when
building modules.

llvm-svn: 144680
diff --git a/clang/lib/Basic/LangOptions.cpp b/clang/lib/Basic/LangOptions.cpp
index 5f479db..991992a 100644
--- a/clang/lib/Basic/LangOptions.cpp
+++ b/clang/lib/Basic/LangOptions.cpp
@@ -26,5 +26,7 @@
 #define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
   Name = Default;
 #include "clang/Basic/LangOptions.def"
+  
+  CurrentModule.clear();
 }