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

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https://hg.mozilla.org/integration/gaia-central/rev/0cf4e803e3bd
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #13661 from EverythingMe/932836-collections-cache-response

Bug 932836 - [e.me] Cache Collection suggestion list for offline state

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https://hg.mozilla.org/integration/gaia-central/rev/e2926e680139
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 932836 - [e.me] Cache Collection suggestion list for offline state
Bug 923177 - [e.me] [feature] Enable adding custom Collections while offline

r=[ranbena, evyatron]