When syncing, git-p4 will only download files that are included in the active
perforce client spec. This does not change the default behaviour - it requires
that the user either supplies the command line argument --use-client-spec, or
sets the git config option p4.useclientspec to "true".
Signed-off-by: Tor Arvid Lund <torarvid@gmail.com> Signed-off-by: Simon Hausmann <simon@lst.de>