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

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https://hg.mozilla.org/integration/gaia-central/rev/78decf03b39d
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #11550 from arcturus/bug-890490

Bug 890490 - Generic export functionallity

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https://hg.mozilla.org/integration/gaia-central/rev/d805050badf1
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Bug 890490 - Generic export functionallity