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

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https://hg.mozilla.org/integration/gaia-central/rev/79c130ec5ca1
Author: Fabrice Desré <fabrice@desre.org>
Desc: Bug 806374 - Don't store phone's wallpaper or the dialer ringtone or the notification ringtone as a data: URI r=vingtetun

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https://hg.mozilla.org/integration/gaia-central/rev/68204ea0ed28
Author: Fabrice Desré <fabrice@desre.org>
Desc: Bug 806374 - Don't store phone's wallpaper or the dialer ringtone or the notification ringtone as a data: URI r=vingtetun