xbps_repo_lock: sleep() for a second if the lock is already taken.
xbps_repo_lock: sleep() for a second if the lock is already taken.

... rather than looping continuously.

datenwolf/xbps,datenwolf/xbps,stpx/xbps,ebfe/xbps,ebfe/xbps,ebfe/xbps,stpx/xbps,stpx/xbps,datenwolf/xbps