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

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https://hg.mozilla.org/integration/gaia-central/rev/3e512cec66ff
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #25281 from KevinGrandon/bug_1083521_update_node_modules

Bug 1083521 - Update node_modules

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https://hg.mozilla.org/integration/gaia-central/rev/c701cfac29a8
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1083521 - Update node_modules r=kgrandon
Bumping manifests a=b2g-bump