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

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https://hg.mozilla.org/integration/gaia-central/rev/7af4d4e39516
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #13528 from EverythingMe/930538-l10n-followups

Bug 930538 - [e.me][feature] Add Collections - l10n follow-ups [r=ranben...

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https://hg.mozilla.org/integration/gaia-central/rev/8914d1dccdd4
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 930538 - [e.me][feature] Add Collections - l10n follow-ups [r=ranbena]