flatpak: Don't build the exiv2 command and the sample programs

!87
3 jobs for wip/rishi/cleanup-exiv2 in 10 minutes and 51 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #178504
flatpak

00:10:22

 
  Review
passed #178505
review

00:00:28

manual #178506
allowed to fail manual
stop_review