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

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https://hg.mozilla.org/integration/gaia-central/rev/e3ae2f87c079
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #12575 from crdlc/bug-922585

Bug 922585 - Maximum number of icons is wrong on first page

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https://hg.mozilla.org/integration/gaia-central/rev/f9ae926b9385
Author: crdlc <crdlc@tid.es>
Desc: Bug 922585 - Maximum number of icons is wrong on first page