po: translable policy for policykit

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
po/ru: translate policy

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
po/ru: typo fix

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>