Sync translations.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

Thanks to a recent commit, the translation files will now
have info about locations where the string is used. That
can help is deciding the correct translation, as all contexts
are more easily found.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

 * Rename subdirectories to their repective OpenWrt package names
 * Make each LuCI module its own standalone package
 * Deploy a shared luci.mk which is used by each module Makefile

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>