Use fsck.repair=yes on pureos

On the phone we don't have a keyboard for interactive fsck so
answer 'y' to everything until the filesystem is fixed or empty.

Closes: #12
2 jobs for fsck in 1 minute and 24 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #194887
librem5
builtin_tests

00:00:40

 
  Pkg
passed #194888
librem5
build-debian-package

00:00:43