Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/fbfdfb1cbf35
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #21553 from nullaus/v2.0

Merge pull request #21503 from nullaus/bug1035367

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https://hg.mozilla.org/integration/gaia-2_0/rev/0985628fcae4
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #21503 from nullaus/bug1035367

bug 1035367 - Update download_ui.js so that it uses data-l10n-id and dat...
(cherry picked from commit 6da21120e77b6a4ad878dd4531305cd393f6734c)
Bumping manifests a=b2g-bump