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

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https://hg.mozilla.org/integration/gaia-central/rev/92e7b0175abd
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #16907 from millermedeiros/972666-lines-over-events-2

Bug 972666 - [Calendar] lines over events longer than 2 hours r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/41e352749ff5
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 972666 - [Calendar] lines over events longer than 2 hours

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https://hg.mozilla.org/integration/gaia-central/rev/82970d7816cd
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #16912 from millermedeiros/979969-marionette-is-view-active

Bug 979969 - [Calendar] calendar.isViewActive should check if element is really "active" on the marionette tests r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/11cc4d709a3d
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 979969 - [Calendar] calendar.isViewActive should check if element is really "active" on the marionette tests
Bumping manifests a=b2g-bump