flatpak: Fix the LibRaw build

The LibRaw-0.19.2 tarball got modified in-place to include a configure
script: https://github.com/LibRaw/LibRaw/issues/197

!90
3 jobs for wip/rishi/libraw-0.19.2-update-hash in 16 minutes and 17 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #179708
flatpak

00:15:23

 
  Review
passed #179709
review

00:00:27

passed #179710
allowed to fail manual
stop_review

00:00:26