Update FirefoxOS app with language fix

It was loading all articles in English regardless of the search language. Oops!

Fix: https://github.com/wikimedia/WikipediaMobileFirefoxOS/commit/c024b5f06884c94cabd2a99574d13ff7b6766568
Version bump: https://github.com/wikimedia/WikipediaMobileFirefoxOS/commit/287a259d94d63ba2aab05c9d591d482928adc11b

Change-Id: I7207b07935fb341512956ae65a774eadd31c72a6