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

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https://hg.mozilla.org/integration/gaia-2_1/rev/ae10cb4fd6df
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1084495 - Commit close in kill

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https://hg.mozilla.org/integration/gaia-2_1/rev/8b80602c7f0b
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1090613 - Cancel fullscreen on showing task manager

Conflicts:
	apps/system/js/task_manager.js

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https://hg.mozilla.org/integration/gaia-2_1/rev/3f2f723042d1
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1088468 - Clear the apn selection cache when the field in settings db is cleared
Bumping manifests a=b2g-bump