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

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https://hg.mozilla.org/integration/gaia-2_1/rev/39d9dea77495
Author: viorelaioia <viorela.ioia@softvision.ro>
Desc: Merge pull request #25701 from JohanLorenzo/bug-1086676-v2.1

Bug 1086676 - Add a test to check notification when you miss a call from...

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https://hg.mozilla.org/integration/gaia-2_1/rev/ce74c33e7429
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1086676 - Add a test to check notification when you miss a call from a known contact
Bumping manifests a=b2g-bump