[analyzer] Finish replacing ObjCMessage with ObjCMethodDecl and friends.

The preObjCMessage and postObjCMessage callbacks now take an ObjCMethodCall
argument, which can represent an explicit message send (ObjCMessageSend) or an
implicit message generated by a property access (ObjCPropertyAccess).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159559 91177308-0d34-0410-b5e6-96231b3b80d8
17 files changed