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

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https://hg.mozilla.org/integration/gaia-2_1/rev/1ef8a47be714
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1088389 - [Search] Remove divider shown when searching r=daleharvey
Bumping manifests a=b2g-bump