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

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https://hg.mozilla.org/integration/gaia-central/rev/63eccd6a2828
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #24531 from jrburke/bug1073788-email-keyboard-blur

Bug 1073788 - [Email] The keyboard is shown even after the form is submitted when click on enter r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/9735c674772f
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1073788 - [Email] The keyboard is shown even after the form is submitted when click on enter
Bumping manifests a=b2g-bump