This options allows to generate patches against relative directory by
using git format-patch --relative option.
See more details about --relative option in git diff manual page.
For example generating bitbake patchsets from poky can be
done this way: create-pull-request -u contrib -d ./bitbake
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
