gzip was including a timestamp, and tar was enumerating files in an
unspecified/variable order.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(+ minor modifiations)
(cherry picked from commit ceacef3bbb0c34d67aa84e6ca91b360cbe2419e5)

Conflicts:

	share/Makefile.am