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

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https://hg.mozilla.org/integration/gaia-central/rev/bce92f813f48
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23539 from KevinGrandon/bug_1060935_statusbar_error

Bug 1060935 - [System] Fix statusbar notification after update check

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https://hg.mozilla.org/integration/gaia-central/rev/3ef8b8440bfe
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1060935 - [System] Fix statusbar notification after update check r=apastor
Bumping manifests a=b2g-bump