Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/085d4fe69600
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #18454 from julienw/915029-vibrate

Bug 915029 - [Messages] always play the sound+vibrate notification when ...

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https://hg.mozilla.org/integration/gaia-central/rev/7be805a0877f
Author: jsiemiatkowski@gmail.com <jsiemiatkowski@gmail.com>
Desc: Bug 915029 - [Messages] always play the sound+vibrate notification when we receive a message, even if we're in the correct thread for the recipient r=schung

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https://hg.mozilla.org/integration/gaia-central/rev/5c93ae04829f
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #18267 from EragonJ/bug-994511

Bug 994511 - [Settings] move Settings.getSettings out of Settings.js

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https://hg.mozilla.org/integration/gaia-central/rev/e504529a42ab
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 994511 - [Settings] move Settings.getSettings out of Settings.js
Bumping manifests a=b2g-bump