package/gnutls: bump version to 3.6.9
Release notes:
https://lists.gnupg.org/pipermail/gnutls-help/2019-July/004556.html
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit a9c509934e067716b0cf210b87c968ba69834d9f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>