Merge branch 'sg/travis-check-untracked'

* sg/travis-check-untracked: travis-ci: check that all build artifacts are .gitignore-d travis-ci: don't store P4 and Git LFS in the working tree

Junio C Hamano committed Jan 9, 2018 at 14:32 UTC 14c84cd55babd4b9016be825d9d9ffeea17065a2

No changes.