Add a sample Finnish localisation. The localised Root.strings files
are supposed to come from some Pootle-based workflow eventually.
Apparently there is some new and improved way to do localisation in
Xcode 10, "Base localisation", but our project file was created in an
earlier Xcode version and I couldn't figure out how to do it the new
way for Settings.bundle, so I manually added the fi.lproj directory.
I changed the English Root.strings file to be in UTF-8 instead of
UTF-16 (and it still works). (The Finnish one is UTF-8, too.) I added
the strings to be translated from Root.plist into it. That is the file
that should be used as a base for Pootle work, no need to extract
strings from the Root.plist, I think.
Change-Id: I80f1c3199ee14678bb1438e218eb9c2475cd66f8
095c4de38b