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

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https://hg.mozilla.org/integration/gaia-central/rev/85d98e9f445d
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #9763 from fzzzy/master

bug 865276 Remove old version of maps from repo; The latest version should be added as a custom app in the distribution file created for a specific release
r=julien

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https://hg.mozilla.org/integration/gaia-central/rev/471097cf085d
Author: Donovan Preston <donovanpreston@gmail.com>
Desc: bug 865276 Remove old version of maps from repo; The latest version should be added as a custom app in the distribution file created for a specific release