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

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https://hg.mozilla.org/integration/gaia-2_1/rev/3744d4f2c3d1
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1088632 - Follow-up, fix json typo r=kgrandon a=nbotb
Bumping manifests a=b2g-bump