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

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https://hg.mozilla.org/integration/gaia-central/rev/077a651b3db5
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #19981 from viorelaioia/bug_1019730

Bug 1019730 - Re-enable test_call_contact.py

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https://hg.mozilla.org/integration/gaia-central/rev/8e2dad09efc0
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1019730 - Re-enable test_call_contact.py
Bumping manifests a=b2g-bump