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

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https://hg.mozilla.org/integration/gaia-2_0/rev/422a2c38f3f6
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #20567 from viorelaioia/bug_1021732

[v2.0] Bug 1021732 - Update test_privileged_app_contacts_prompt to match new prompt behaviour

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https://hg.mozilla.org/integration/gaia-2_0/rev/342e4b997fc3
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1021732 - Update test_privileged_app_contacts_prompt to match new prompt behaviour
Bumping manifests a=b2g-bump