Commit
46ad961d2c0297052b2e7da0a55f0c6f30e73daa
by Oliver Smithdeps/update: skip checkout if nothing to do
Let the user see what changes when running "make deps" instead of
having unrelated lines for checking out the commits that are already
checked out.
Change-Id: I572ab11afd56e34d9d0d04cd1372af749caa7d48