A team member is currently working on the Basque l10n of Fennec, and for the time we are finished we would like to be added in the all-locales file in mobile-browser, in order to have Fennec in the dashboard and nightly builds. I'll follow up when we do our first push.
Pushed: http://hg.mozilla.org/releases/l10n-mozilla-1.9.2/eu/rev/ff831162c8bb Maybe some files are outdated but I think this is good for a start.
http://hg.mozilla.org/mobile-browser/rev/bee2f973d3d4, fixed. Should show up on the dashboard on the next check-in.