[analyzer] Handle C++ member initializers and destructors.

This uses CFG to tell if a constructor call is for a member, and uses
the member's region appropriately.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160808 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed