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

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https://hg.mozilla.org/integration/gaia-central/rev/d29ac061b001
Author: Ran Ben Aharon <ran@everything.me>
Desc: Merge pull request #13369 from EverythingMe/v1.2-apikey

Bug 934768 - [e.me] API key change for v1.2 [r=crdlc]

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https://hg.mozilla.org/integration/gaia-central/rev/7f4206970f84
Author: Ran Ben Aharon <ran@ranbena.com>
Desc: Bug 934768 - [e.me] API key change for v1.2 [r=crdlc]