Add IBAction attribute to keep the IBOutlet attribute company.

llvm-svn: 96447
diff --git a/clang/lib/AST/AttrImpl.cpp b/clang/lib/AST/AttrImpl.cpp
index d819797..dd6e356 100644
--- a/clang/lib/AST/AttrImpl.cpp
+++ b/clang/lib/AST/AttrImpl.cpp
@@ -139,6 +139,10 @@
   return ::new (C) IBOutletAttr;
 }
 
+Attr *IBActionAttr::clone(ASTContext &C) const {
+  return ::new (C) IBActionAttr;
+}
+
 Attr *GNUInlineAttr::clone(ASTContext &C) const {
   return ::new (C) GNUInlineAttr;
 }