[PATCH 0 of 1] rebase of git-style MQ patches loses --git

[Giorgos Keramidas]

When git-style MQ patches are rebased, the rebase extension loses
the --git option, even when defaults.qrefresh includes --git.

The attached patch modifies test-rebase-mq to run a test with
this sort of MQ patch, and test-rebase-mq.out with the expected
output.  It should fail to run on crew:c2ecaf63bade though.