Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/2fccee502f45
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1001160 - Dont load mozilla.org when opening rocketbar browser r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/5ac8a8ff29de
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 985460 - [Home2] Edit mode follow-up r=me

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https://hg.mozilla.org/integration/gaia-central/rev/c72dd1165f5b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 995406 - [Home2] Follow-up, hide confirm dialog completely r=me
Bumping manifests a=b2g-bump