xbps-rindex: clean mode: fixed random false positives with multiple threads.
xbps-rindex: clean mode: fixed random false positives with multiple threads.

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