Add the ObjFW runtime.  Patch by Jonathan Schleifer!

llvm-svn: 160102
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index bba3e7c..22ac115 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -140,6 +140,7 @@
   switch (LangOpts.ObjCRuntime.getKind()) {
   case ObjCRuntime::GNUstep:
   case ObjCRuntime::GCC:
+  case ObjCRuntime::ObjFW:
     ObjCRuntime = CreateGNUObjCRuntime(*this);
     return;