Makefile: do not have git.o depend on common-cmds.h
Makefile: do not have git.o depend on common-cmds.h

This dependency has been stale since 70827b1 (Split up
builtin commands into separate files from git.c, 2006-04-21).

Signed-off-by: Jeff King <696e3fbcf235d40b6ea1ebd61c87cbea79d444e7@peff.net>
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