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

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https://hg.mozilla.org/integration/gaia-central/rev/5e6eca13f1e8
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #13486 from KevinGrandon/settings_desktop_shims

Bug 936185 - [Settings] Move shims into desktop helper r=evelyn

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https://hg.mozilla.org/integration/gaia-central/rev/5a3f6ecdc86a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 936185 - [Settings] Move shims into desktop helper.