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

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https://hg.mozilla.org/integration/gaia-central/rev/c2b0076e2a9c
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #25197 from jrburke/bug1083288-email-keyboard-lag-manual

Bug 1083288 - Lag when typing on keyboard after press Next button during config r=mcav

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https://hg.mozilla.org/integration/gaia-central/rev/f600308ac4c3
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1083288 - Lag when typing on keyboard after press Next button during configuration of Email App
Bumping manifests a=b2g-bump