git-svn: add --authors-file test
git-svn: add --authors-file test

I'm not sure how often this functionality is used, but in case
it's not, having an extra test here will help catch breakage
sooner.

Signed-off-by: Eric Wong <8c2951295f8292b0c03727bc4652981172298eae@yhbt.net>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git