wonder how that ever worked. cat and sed are in /bin, not /usr/bin.
Appparetly the BSDs have them there, though, so generalize though this
is for distros and it probably shouldn't matter.

Change-Id: I6efb3e92b8f8d15f3671090a3eaa9d8836f9998f
Reviewed-on: https://gerrit.libreoffice.org/39276Reviewed-by: Rene Engelhard <rene@debian.org>
Tested-by: Rene Engelhard <rene@debian.org>