test localizable descriptions
This adds localized app descriptions for 5 apps that I semi-randomly chose based on download counts and lowest chance that the upstream will ever include these files in their source repo. Ideally, we'd push all of these files upstream and have them maintained there. The new localization support also includes support for localizing app descriptions in fdroiddata for cases where we need it.
Including these now does not mean that we are committing to having them in fdroiddata forever. It is important to include these now so that we can test localization with repomaker, fdroidclient, fdroid-website, etc. before switching over to the new V1 index format on f-droid.org.
This is blocked by fdroidserver!269 (merged)