Bumping gaia.json for 1 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/7ed258cbcf68
Author: Rick Waldron <waldron.rick@gmail.com>
Desc: Bug 957714 - [Messages] Interacting with message field prevents recipients field from stealing focus (cursor jump) r=julienw

https://bugzilla.mozilla.org/show_bug.cgi?id=957714
Signed-off-by: Rick Waldron <waldron.rick@gmail.com>