Introduce and run clang-format updated to newer version

Summary: Update clang-format to v1.8.0 since 1.7.0 does not work on Intel

Test Plan: Check that yarn clang-format-all works on Intel mac

Reviewers: palys-swm, atul, ashoat

Reviewed By: palys-swm, ashoat

Subscribers: Adrian, yayabosh

Differential Revision: https://phabricator.ashoat.com/D4064