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

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https://hg.mozilla.org/integration/gaia-central/rev/11fd876edd2f
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #18152 from alivedise/bugzilla/825435/dupe-alert

Bug 994537 - Fix dupe alert, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/f6c5ba66c22e
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 994537 - Fix dupe alert

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https://hg.mozilla.org/integration/gaia-central/rev/4da5e5de135e
Author: evanxd <itoyxd@gmail.com>
Desc: Merge pull request #18289 from KevinGrandon/bug_995569_search_calendar_dependency

Bug 995569 - [Search] Do not depend on calendar.js in test r=evanxd

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https://hg.mozilla.org/integration/gaia-central/rev/c7754e3e1537
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 995569 - [Search] Do not depend on calendar.js in test r=evanxd
Bumping manifests a=b2g-bump