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

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https://hg.mozilla.org/integration/gaia-central/rev/1ce2678b36c4
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #17772 from gaye/bug-987354

Bug 987354 - Migrate today_test.js to use new view code r=millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/69cd2d69e540
Author: Gareth Aye <gaye@mozilla.com>
Desc: Bug 987354 - Migrate today_test.js to use new view code

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https://hg.mozilla.org/integration/gaia-central/rev/f9595153a75d
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Merge pull request #17826 from millermedeiros/990148-day-view-event-specificity

Bug 990148 - [Calendar] increase specificity of Day View events selector on marionette tests r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/fc0af637a3b5
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 990148 - [Calendar] increase specificity of Day View events selector on marionette tests
Bumping manifests a=b2g-bump