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

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https://hg.mozilla.org/integration/gaia-central/rev/645620572c79
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #24455 from jrburke/bug1069992-email-wobbly-refresh

Bug 1069992 - [E-Mail] Wobbly Refresh Icon Animation r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/1107b3ae6cf4
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1069992 - [E-Mail] Wobbly Refresh Icon Animation
Bumping manifests a=b2g-bump