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

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https://hg.mozilla.org/integration/gaia-central/rev/2fa2d77525c0
Author: Rudy Lu <left.lu@gmail.com>
Desc: Merge pull request #13110 from RudyLu/keyboard/Bug925003_greekSMS_master_v1.2

Bug 925003 - Add a new keyboard layout, "Greek SMS" to allow sending mes...
r=djf, julienw

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https://hg.mozilla.org/integration/gaia-central/rev/7413aadf84d5
Author: Rudy Lu <left.lu@gmail.com>
Desc: Bug 925003 - Add a new keyboard layout, "Greek SMS" to allow sending messages with GSM 7-bit encoding.
 - Disable auto crrection for Greek SMS keyboard layout.