ObjectiveC - Introducing objc_bridge_related attribute 
which specifies couple of (optional) method selectors
for bridging a CFobject to or from an ObjectiveC 
object. This is wip. // rdsr://15499111


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196408 91177308-0d34-0410-b5e6-96231b3b80d8