Add back 'loc' to import list in rt-crontool

00c64f5 mistakenly removed both sources of 'loc' (the import and
explicit subroutine), leaving an un-working rt-crontool.  Restore the
'loc' import from RT::Interface::CLI.

Reported by Lars Bräuer <lb@mpexnet.de>.
Merge branch '4.0/crontool-loc' into 4.0-trunk