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

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https://hg.mozilla.org/integration/gaia-central/rev/9214b46e6628
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #15185 from jrburke/bug950037-email-tap-icon-error

Bug 950037 - [Email][V1.3] Tap < icon cannot get any response

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https://hg.mozilla.org/integration/gaia-central/rev/2c40a38ce27e
Author: jrburke <jrburke@gmail.com>
Desc: Bug 950037 - [Email][V1.3] Tap < icon cannot get any response