Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/e6d724985c58
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 1062312 - Add the 'critical' mozapptype attribute to the callscreen, not the dialer r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/d93acc29a81c
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23838 from shamenchens/Bug1064485-ClearRocketbarResults-2

Bug 1064485 - Hide results when click clear button on rocketbar r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/5f51b8c7512a
Author: Sherman Chen <shamen.chens@gmail.com>
Desc: Bug 1064485 - Hide results when click clear button on rocketbar
Bumping manifests a=b2g-bump