build: add .lbox.check
build: add .lbox.check

This will check for formatting issues, both at proposal time
and at submit time (on the merged branch). It requires an
up-to-date lbox to work.

howbazaar/juju,dimitern/juju,anastasiamac/juju,gabriel-samfira/juju,axw/juju,waigani/juju,marcoceppi/juju,bogdanteleaga/juju,ericsnowcurrently/juju,mjs/juju,rogpeppe/juju,frankban/juju,jrwren/juju,fwereade/juju,perrito666/juju,cherylj/juju,bac/juju,cloud-green/juju,marcoceppi/juju,mattyw/juju,frankban/juju,ericsnowcurrently/juju,fwereade/juju,mikemccracken/juju,waigani/juju,tsakas/juju,waigani/juju,tych0/juju,bogdanteleaga/juju,cmars/juju,dooferlad/juju,davecheney/juju,tych0/juju,alesstimec/juju,makyo/juju,tasdomas/juju,ericsnowcurrently/juju,marcmolla/juju,bac/juju,bac/juju,frobware/juju,kat-co/juju,gabriel-samfira/juju,marcmolla/juju,davecheney/juju,sinzui/juju,mjs/juju,wwitzel3/juju,ericsnowcurrently/juju,marcoceppi/juju,sinzui/juju,dooferlad/juju,kat-co/juju,macgreagoir/juju,mjs/juju,anastasiamac/juju,tasdomas/juju,frankban/juju,alesstimec/juju,dimitern/juju,frankban/juju-tmp,axw/juju,mattyw/juju,tsakas/juju,thomnico/juju,frankban/juju,axw/juju,makyo/juju,voidspace/juju,Altoros/juju-vmware,sinzui/juju,axw/juju,gabriel-samfira/juju,anastasiamac/juju,bac/juju,cloud-green/juju,ericsnowcurrently/juju,macgreagoir/juju,makyo/juju,frankban/juju-tmp,mikemccracken/juju,dooferlad/juju,tych0/juju,axw/juju,howbazaar/juju,davecheney/juju,AdamIsrael/juju,kat-co/juju,bz2/juju,tasdomas/juju,bz2/juju,mikemccracken/juju,Altoros/juju-vmware,fwereade/juju,Altoros/juju-cloudsigma,alesstimec/juju,macgreagoir/juju,dooferlad/juju,cmars/juju,cmars/juju,mjs/juju,cherylj/juju,thomnico/juju,wwitzel3/juju,jrwren/juju,bogdanteleaga/juju,frobware/juju,mhilton/juju-juju,howbazaar/juju,jrwren/juju,bz2/juju,voidspace/juju,cherylj/juju,reedobrien/juju,Altoros/juju-vmware,AdamIsrael/juju,Altoros/juju-cloudsigma,gabriel-samfira/juju,mikemccracken/juju,mhilton/juju,sinzui/juju,reedobrien/juju,perrito666/juju,Altoros/juju-cloudsigma,mjs/juju,perrito666/juju,mhilton/juju,frobware/juju,voidspace/juju,gabriel-samfira/juju,bogdanteleaga/juju,howbazaar/juju,frankban/juju-tmp,mattyw/juju,perrito666/juju,dimitern/juju,davecheney/juju,rogpeppe/juju,cmars/juju,marcmolla/juju,bac/juju,cloud-green/juju,tasdomas/juju,wwitzel3/juju,macgreagoir/juju,reedobrien/juju,makyo/juju,AdamIsrael/juju,rogpeppe/juju,alesstimec/juju,anastasiamac/juju,mjs/juju,frankban/juju,macgreagoir/juju,dimitern/juju,kat-co/juju,marcmolla/juju,mhilton/juju,tsakas/juju,frankban/juju-tmp,mikemccracken/juju,marcoceppi/juju,mhilton/juju-juju,thomnico/juju,perrito666/juju,Altoros/juju-vmware,cloud-green/juju,bz2/juju,reedobrien/juju,thomnico/juju,marcmolla/juju,dimitern/juju,waigani/juju,AdamIsrael/juju,alesstimec/juju,tych0/juju,mhilton/juju,tsakas/juju,voidspace/juju,wwitzel3/juju,kat-co/juju,bz2/juju,howbazaar/juju,mattyw/juju,Altoros/juju-cloudsigma,mhilton/juju-juju,mjs/juju,reedobrien/juju,anastasiamac/juju,fwereade/juju,reedobrien/store,cherylj/juju,mhilton/juju-juju,dooferlad/juju