LU-3434 misc: style check whole patch when rebasing

LU-3434 misc: style check whole patch when rebasing

When rebasing a patch, style check the whole patch instead of just
the part that has changed.  Otherwise, if the patch was previously
developed on a system without the prepare-commit-msg hook it will
not be properly checked before submission, possibly incurring the
ire of HPDD Checkpatch.

Test-Parameters: trivial

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I603577450d3524ab7bb3d4a4d0bdf8ce463ebbe5
Reviewed-on: http://review.whamcloud.com/8644
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>