Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/81394884de67
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #11765 from davidflanagan/bug908941

Bug 908941: add a latin version of the Serbian auto-correct dictionary r=RudyLu

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https://hg.mozilla.org/integration/gaia-central/rev/1c0ba0d28cad
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 908941: add a latin version of the Serbian auto-correct dictionary