run-command (Windows): Run dashless "git <cmd>"
run-command (Windows): Run dashless "git <cmd>"

We prefer running the dashless form, and POSIX side already does so; we
should use it in MinGW's start_command(), too.

Signed-off-by: Steffen Prohaska <0aa497b8475a933a4e2a8b8666146d28b036a2b1@zib.de>
Acked-by: Johannes Sixt <5cc107486946fdcf16e86d7c808fa50f4312125f@telecom.at>
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