make_dev_ssd: Include full command path in error/help message

Let's use the actual command/path used to call make_dev_ssd.sh,
instead of hard-coding './'.

BRANCH=none
BUG=none
TEST=/usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification
     outputs a command that can just be copy-pasted:
     sudo /usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification --partitions 4
     (instead of:
     sudo ./make_dev_ssd.sh --remove_rootfs_verification --partitions 4
     )

Change-Id: I903f94acc1fb310926b149c1e79e4017bf513e27
Reviewed-on: https://chromium-review.googlesource.com/737810
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
1 file changed