Bumping gaia.json for 4 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/cd60a8a09cd0
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #12613 from cctuan/922462-fix

Bug 922462 - [Flatfish] Define various size of icons in manifest instead of use buildscript

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https://hg.mozilla.org/integration/gaia-central/rev/42270cf59679
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 922462 - Define various size of icons in manifest instead of use buildscript

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https://hg.mozilla.org/integration/gaia-central/rev/c32b03d0eb0b
Author: Ran Ben Aharon <ran@everything.me>
Desc: Merge pull request #12652 from EverythingMe/analytics-changes

Bug 910333 - [e.me][feature] Update stats reports [r=crdlc]

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https://hg.mozilla.org/integration/gaia-central/rev/2b274aebcc7f
Author: Ran Ben Aharon <ran@ranbena.com>
Desc: Bug 910333 - [e.me][feature] Update stats reports [r=crdlc]