Transferred loop-convert tests to cpp11-migrate

- Turned off -count-only tests as they aren't supported in cpp11-migrate
  yet.
- Updated tests to use new binary name and options to access
  loop-convert transform.
- Fixed header guards to not use restricted names.

Reviewers: klimek, gribozavr



git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@171852 91177308-0d34-0410-b5e6-96231b3b80d8