Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5a906b6379e0
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #25424 from mwargers/1079399

Bug 1079399 - Remove Gaiaapps.uninstall because it is unused

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https://hg.mozilla.org/integration/gaia-central/rev/705183da0db8
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1079399 - Remove Gaiaapps.uninstall because it is unused

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https://hg.mozilla.org/integration/gaia-central/rev/a63586bab7f9
Author: sv99 <sv99@inbox.ru>
Desc: Bug 1087866 - [sms] unit test refactoring for new version chai.assert api r=julien
Bumping manifests a=b2g-bump