[static analyzer] Tweak RetainCountChecker's diagnostics to correctly indicate if a message was due to a property access.  This can
potentially be refactored for other clients, and this is a regression from the refactoring of property acceses.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144571 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed