Update release notes for 3.12.8 release

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Translation updates for 3.12.08 release

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
(cherry picked from commit 08c10c09f5a87883e8e22e3a0d2eb915837b2afb)
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Increment version for 3.12.8 release

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>