Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/333f877ae402
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #21341 from yurenju/jshint-utils-node

Bug 1032038 - Fix jshint error for build/utils-node.js r=@cctuan

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https://hg.mozilla.org/integration/gaia-central/rev/a5211aed3a6d
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 1032038 - Fix jshint error for build/utils-node.js

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https://hg.mozilla.org/integration/gaia-central/rev/47b768c7f373
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #21262 from yurenju/jshint-webapp-shared

Bug 1032048 - Fix jshint error for build/webapp-shared.js r=@cctuan

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https://hg.mozilla.org/integration/gaia-central/rev/2be23c67db00
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 1032048 - Fix jshint error for build/webapp-shared.js
Bumping manifests a=b2g-bump