[`clang-format`](http://clang.llvm.org/docs/ClangTools.html#clang-format) is a helpful linting tool for Objective-C.
[`clang-format-linter`](https://github.com/vhbit/clang-format-linter) makes it easy to use clang-format with arcanist as a linter.
Would it be reasonable to add `clang-format-linter` to the included set of linters in arcanist? I see that there are other arcanist linters listed in the [Community Resources](https://secure.phabricator.com/w/community_resources/) page, so I'd be happy to just add a link there if that's preferable.