Ran check-clang

Fix command line tool.

• Merge branch 'master' of http://llvm.org/git/clang into replace_template

use llvm::report_fatal_error instead of unreachable.

Thanks, added tests for parser failures.

• additional tests

Fixed the test -- I am still getting used to the different ninja test targets.

• fix test

Thank you for the feedback, addressed and reformatted using llvm style.

Response to initial code review.

• use iter

(marking other comments as done).

Thank you for the initial feedback!

• change to push_back

Address code feedback & Reformat with clang-format --style llvm.

• Add header to unit test fixture.

I slightly changed the approach of this CL, and added a test. This now also works in clang_tidy is called from a different working directory.

Instead modify IncludeInserter to classify correctly.

Thanks for the review!