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

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https://hg.mozilla.org/integration/gaia-central/rev/534b29c2871b
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Merge pull request #14917 from EverythingMe/949796-unstyled-flash

Bug 949796 - brief flash of tiny buttons after focusing e.me search box ...

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https://hg.mozilla.org/integration/gaia-central/rev/ac32d528f7cf
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 949796 - brief flash of tiny buttons after focusing e.me search box on homescreen [r=ranbena]