Translates all (leftovers) found using a custom regex, in directories not
shown by /bin/find-german-comments and beginning with "a" to "c".

Change-Id: I3b0152ee78ad80a29d714cbd98bf888f31be4763
Reviewed-on: https://gerrit.libreoffice.org/37573Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>