Add a new placeholder type to represent "unbridged"
casts in ARC.

No semantic analysis yet.

llvm-svn: 142208
diff --git a/clang/lib/Analysis/PrintfFormatString.cpp b/clang/lib/Analysis/PrintfFormatString.cpp
index 46ece65..0c0e343 100644
--- a/clang/lib/Analysis/PrintfFormatString.cpp
+++ b/clang/lib/Analysis/PrintfFormatString.cpp
@@ -400,6 +400,7 @@
   case BuiltinType::Overload:
   case BuiltinType::BoundMember:
   case BuiltinType::UnknownAny:
+  case BuiltinType::ARCUnbridgedCast:
     // Misc other stuff which doesn't make sense here.
     return false;