Revert r183721. It caused cleanups to be delayed too long in some cases.
Testcase to follow.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@183776 91177308-0d34-0410-b5e6-96231b3b80d8
Include PathV1.h in files that use it.

This is preparation for replacing Path.h with PathV2.h.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@183781 91177308-0d34-0410-b5e6-96231b3b80d8