xbps-uhelper: optimize some targets where xbps_init() is not necessary.
xbps-uhelper: optimize some targets where xbps_init() is not necessary.

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