helpers: Add helper to locally run xfce-build

4 jobs for master in 12 minutes and 45 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  .Pre
passed #7318
build-container

00:11:33

 
  Build
passed #7320
build

00:00:48

passed #7319
translations

00:00:39

 
  Distcheck
passed #7321
distcheck

00:00:23