Provide an Objective C mangling for wchar_t.  Patch by Nico Weber!



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@105818 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 1cc8eb8..e2074e8 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -3477,6 +3477,7 @@
     case BuiltinType::Char_S:
     case BuiltinType::SChar:      return 'c';
     case BuiltinType::Short:      return 's';
+    case BuiltinType::WChar:
     case BuiltinType::Int:        return 'i';
     case BuiltinType::Long:
       return