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

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https://hg.mozilla.org/integration/gaia-central/rev/a2bd64c9b973
Author: Rudy Lu <left.lu@gmail.com>
Desc: Merge pull request #11703 from unghost/master

Fix Bug 908343 and Bug 908350

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https://hg.mozilla.org/integration/gaia-central/rev/c54b0a63f50d
Author: Alexander Slovesnik <unghost@gmail.com>
Desc: [Bug 908343] The letter yer is missed in Russian keyboard and [Bug 908350] Not possible to enter letter Yo on Russian keyboard