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

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https://hg.mozilla.org/integration/gaia-2_0/rev/d1e78a2ddbdf
Author: AndreiH <andrei.hutusoru@softvision.ro>
Desc: Merge pull request #20755 from viorelaioia/bug_1000037

Bug 1000037 - Refactor and re-enable test_import_contacts_gmail.py

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https://hg.mozilla.org/integration/gaia-2_0/rev/daeb4966e2d2
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1000037 - Refactor and re-enable test_import_contacts_gmail.py
Bumping manifests a=b2g-bump