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

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https://hg.mozilla.org/integration/gaia-central/rev/a2ca11fa5a69
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #11049 from crdlc/bug-894865

Bug 894865 - Implement UI for active merge with suggestions from contact...

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https://hg.mozilla.org/integration/gaia-central/rev/b9b6293a50f1
Author: crdlc <crdlc@tid.es>
Desc: Bug 894865 - Implement UI for active merge with suggestions from contact detail