libtracker-db: Avoid strstr in uri_is_parent and uri_is_descendant
libtracker-db: Avoid strstr in uri_is_parent and uri_is_descendant

outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker