[Trisquel-devel] [PATCH v2] fix makepackage system to build make-exaile

[andrew at andrewlindley.co.uk]

This fixes #12811 which is Exaile is missing from the Belenos repos.
On investigation the only problem was the makepackage system would not
build it.

The changes are:

  The new helpers/config needs a shell specifying on the su nobody
  because nobody's default shell /usr/sbin/nologin won't execute any
  commands

  guard the fuser -k because on a lightly loaded modern desktop the
  tmpfs pre-jail will have no handles open and fuser will by design
  return exit code 1.  In the event of a fatal error on a tmpfs the
  following umount will catch this.

  add a dependency which is missing from the jails 

Leny