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

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https://hg.mozilla.org/integration/gaia-central/rev/24561473dedb
Author: Mason Chang <mason@masonchang.com>
Desc: Merge pull request #14274 from changm/bug942339

bug 942339, add will-animate to scrollable area in sms app, r+ benwa

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https://hg.mozilla.org/integration/gaia-central/rev/4f8ab9c9a943
Author: Mason Chang <mchang@mozilla.com>
Desc: bug 942339, add will-animate to scrollable area in sms app