Downgrade err_iboutlet_object_type to a warning.  It was breaking a bunch of code.  We will reconsider promoting it back to an error later.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@143470 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index 9f025a2..74d22e7 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -760,14 +760,14 @@
   // have an object reference type.
   if (const ObjCIvarDecl *VD = dyn_cast<ObjCIvarDecl>(D)) {
     if (!VD->getType()->getAs<ObjCObjectPointerType>()) {
-      S.Diag(Attr.getLoc(), diag::err_iboutlet_object_type)
+      S.Diag(Attr.getLoc(), diag::warn_iboutlet_object_type)
         << Attr.getName() << VD->getType() << 0;
       return false;
     }
   }
   else if (const ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D)) {
     if (!PD->getType()->getAs<ObjCObjectPointerType>()) {
-      S.Diag(Attr.getLoc(), diag::err_iboutlet_object_type) 
+      S.Diag(Attr.getLoc(), diag::warn_iboutlet_object_type) 
         << Attr.getName() << PD->getType() << 1;
       return false;
     }