Downgrade error about attribute 'iboutlet' and 'ibaction' being applied to anything but a instance method to a warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124858 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaObjC/ibaction.m b/test/SemaObjC/ibaction.m
index b97e002..bcedf83 100644
--- a/test/SemaObjC/ibaction.m
+++ b/test/SemaObjC/ibaction.m
@@ -4,10 +4,12 @@
 {
   __attribute__((iboutlet)) id myoutlet;
 }
++ (void) __attribute__((ibaction)) myClassMethod:(id)msg; // expected-warning{{ibaction attribute can only be applied to Objective-C instance methods}}
 - (void) __attribute__((ibaction)) myMessage:(id)msg;
 @end
 
 @implementation Foo
++ (void) __attribute__((ibaction)) myClassMethod:(id)msg {} // expected-warning{{ibaction attribute can only be applied to Objective-C instance methods}}
 // Normally attributes should not be attached to method definitions, but
 // we allow 'ibaction' to be attached because it can be expanded from
 // the IBAction macro.