Change LIB/USAGE call to just USAGE
Change LIB/USAGE call to just USAGE

With the mass migration of setup code to the host executable, the
USAGE command implementing command line help was moved too.  But the
call still looked for it in LIB.

giuliolunati/ren-c,hostilefork/rebol,kealist/ren-c,codebybrett/ren-c,rgchris/ren-c,kealist/ren-c,codebybrett/ren-c,draegtun/ren-c,draegtun/ren-c,hostilefork/rebol,hostilefork/rebol,kealist/ren-c,giuliolunati/ren-c,draegtun/ren-c,draegtun/ren-c,giuliolunati/ren-c,kealist/ren-c,rgchris/ren-c,draegtun/ren-c,hostilefork/rebol,hostilefork/rebol,rgchris/ren-c,rgchris/ren-c,codebybrett/ren-c,hostilefork/rebol,kealist/ren-c,rgchris/ren-c,giuliolunati/ren-c,kealist/ren-c,codebybrett/ren-c,draegtun/ren-c,codebybrett/ren-c,giuliolunati/ren-c,codebybrett/ren-c