Add basic support for properties references (a missing feature).

While it is far from complete, it does fix the following <rdar://problem/5967199> clang on xcode: error: member reference is not to a structure or union



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51719 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed