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

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https://hg.mozilla.org/integration/gaia-2_0/rev/02390612469d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1022383 - [Collection App] Should show four columns instead of three r=amirn

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https://hg.mozilla.org/integration/gaia-2_0/rev/76d13488d2c4
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1022423 - App names disappear after switching locale

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https://hg.mozilla.org/integration/gaia-2_0/rev/5013cdca3a7f
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Bug 1021731 - e.me text suggestions are not showing. r=daleharvey