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

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https://hg.mozilla.org/integration/gaia-central/rev/007fdda5e885
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #15369 from jrburke/bug960094-email-css-warnings

Bug 960094 - Multiple CSS warnings shown when launching E-Mail app r=mcav

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https://hg.mozilla.org/integration/gaia-central/rev/0ea4ed4f3059
Author: jrburke <jrburke@gmail.com>
Desc: Bug 960094 - Multiple CSS warnings shown when launching E-Mail app