Add "build: " prefix to verbose messages
Add "build: " prefix to verbose messages

arithmetric/restic,byo/restic,jayme-github/restic,howeyc/restic,stuertz/restic,byo/restic,restic/restic,episource/restic,kurin/restic,bchapuis/restic,restic/restic,ckemper67/restic,middelink/restic,middelink/restic,jayme-github/restic,fawick/restic,kurin/restic,ar-jan/restic,stuertz/restic,pombredanne/restic,fawick/restic,ar-jan/restic,mappu/restic