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

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https://hg.mozilla.org/integration/gaia-central/rev/905b27d99e15
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #11168 from jlebar/wireless-network-string

Bug 868510 - Change the no wifi found string to "No wireless networks fo...

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https://hg.mozilla.org/integration/gaia-central/rev/3dadb9aa8e75
Author: Justin Lebar <justin.lebar@gmail.com>
Desc: Bug 868510 - Change the no wifi found string to "No wireless networks found".