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

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https://hg.mozilla.org/integration/gaia-central/rev/0a9faa02c877
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #12723 from EverythingMe/924362-populate-once

Bug 924362 - [e.me] Apps removed from Collection re-appear after homescr...

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https://hg.mozilla.org/integration/gaia-central/rev/042e52cb3b6b
Author: Amir Nissim <amirn@everything.me>
Desc: Bug 924362 - [e.me] Apps removed from Collection re-appear after homescreen restarts