Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/cf21c41e1e21
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19175 from KevinGrandon/bug_1009166_home2_dragdrop_speed

Bug 1009166 - [Home2] Dragging an Icon to the Bottom in Edit Mode is Too Slow

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https://hg.mozilla.org/integration/gaia-central/rev/27d70896db8d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1009166 - [Home2] Dragging an Icon to the Bottom in Edit Mode is Too Slow r=me
Bumping manifests a=b2g-bump