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

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https://hg.mozilla.org/integration/gaia-central/rev/7654b8835a23
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #12509 from evanxd/bug-918995

Bug 918995 - [1.2][email] Multiple email notification should have senders listed in reverse chronological order of email timestamp

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https://hg.mozilla.org/integration/gaia-central/rev/2417cf5a1757
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 918995 - The message senders show in notification bar are ordered by latest to oldest. r=jrburke
Bug 914514 - Close socket right after the user stops the transmission, r=gyeh, r=btian

Instead of setting a flag, this patch would shutdown current connection
right after the user stopped the transmission.