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

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https://hg.mozilla.org/integration/gaia-central/rev/fe2d4f241fab
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #15741 from gaye/backout-bug-9500080

Revert "Bug 950080 - add grunt jsdoc generator to gaia"

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https://hg.mozilla.org/integration/gaia-central/rev/d43a57b61a24
Author: Gareth Aye <gaye@mozilla.com>
Desc: Revert "Bug 950080 - add grunt jsdoc generator to gaia"

This reverts commit 508f3b37a2ea0953d2817464f285ec1d8b08dd2e.

Conflicts:
	Gruntfile.js
	package.json
Bumping manifests a=b2g-bump