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

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https://hg.mozilla.org/integration/gaia-central/rev/8ea3299fb147
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #21536 from viorelaioia/bug_1021732

Bug 1021732 - [Flame] Re-enable test_privileged_app_contacts_prompt

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https://hg.mozilla.org/integration/gaia-central/rev/cf860e6c401b
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1021732 - [Flame] Re-enable test_privileged_app_contacts_prompt
Bumping manifests a=b2g-bump