Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/66eb49e9eccf
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #22988 from mancas/bug1052938

Bug 1052938 - [B2G][Flame][2.0][Contact] No error message prompted when ...
Conflicts:
	apps/communications/contacts/test/unit/export/mock_export_utils.js

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https://hg.mozilla.org/integration/gaia-2_0/rev/bf9244fbaea5
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #22881 from ferjm/bug1049340.mobileiderroroverlay

Bug 1049340 - [Loop] Mobile Identity windows in background. r=alive
Conflicts:
	build/csslint/xfail.list

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https://hg.mozilla.org/integration/gaia-2_0/rev/3eb0ad798b7b
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #22868 from mpizza/Bug_1053614_release_status_bug

Bug 1053614 - [woodduck] repeatedly enter and leave camera app, then hig...h chance camera will be black screen when entering camera.
Bumping manifests a=b2g-bump