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

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https://hg.mozilla.org/integration/gaia-central/rev/3bbb2a959ee6
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #25130 from albertopq/1082457-add-int-tests-statusbar

Bug 1082457 - Adding integration tests to statusbar r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/b76c42fc1946
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1082457 - Adding integration tests to statusbar
Bumping manifests a=b2g-bump