Merge branch 'rj/add-chmod-error-message' into maint

Message fix. * rj/add-chmod-error-message: builtin/add: add detail to a 'cannot chmod' error message

Junio C Hamano committed Sep 10, 2017 at 17:03 UTC 70def2c47fd541b6c62629a23054c317428ea43e

No changes.