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

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https://hg.mozilla.org/integration/gaia-central/rev/72615b79efd6
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #10981 from ganesh7/bug_819628

Bug 819628

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https://hg.mozilla.org/integration/gaia-central/rev/ab0e5cfec4bf
Author: gghosh <ganeshghosh@gmail.com>
Desc: BUG 819628 - incremental commit changes into a single commit.