package/gst1-libav: bump version to 1.18.5
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit e2bfdc4f187ceb1c8b68971dcd789906f931037f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>