Add IBAction attribute to keep the IBOutlet attribute company.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96447 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHReaderDecl.cpp b/lib/Frontend/PCHReaderDecl.cpp
index 625997c..f47a60f 100644
--- a/lib/Frontend/PCHReaderDecl.cpp
+++ b/lib/Frontend/PCHReaderDecl.cpp
@@ -517,6 +517,10 @@
     SIMPLE_ATTR(GNUInline);
     SIMPLE_ATTR(Hiding);
 
+    case Attr::IBActionKind:
+      New = ::new (*Context) IBActionAttr();
+      break;
+
     case Attr::IBOutletKind:
       New = ::new (*Context) IBOutletAttr();
       break;