Allow specifying file names and extra arguments when running clang-tidy unit tests.

Will become useful soon.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@215438 91177308-0d34-0410-b5e6-96231b3b80d8
[clang-tidy] Disable the warning on implicit bool* to bool conversion in macros.

It's just too noisy and the warning isn't very helpful in those cases.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@215439 91177308-0d34-0410-b5e6-96231b3b80d8