Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5c84b2ea989d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 1065520 - [Calendar][Week View] Events still display in Week view after they are deleted from another View"

This reverts commit cdd17273d47781dfea8636e58c75415427f87a44.
Bumping manifests a=b2g-bump