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

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https://hg.mozilla.org/integration/gaia-central/rev/3cc983ac0c9c
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #19863 from jmcanterafonseca/restore_organization

Bug 1018851 - Facebook Contacts edit mode is not consistent nor correctly implemented according to the Visual Refresh specs

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https://hg.mozilla.org/integration/gaia-central/rev/56849c321762
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1018851 - Facebook Contacts edit mode is not consistent nor correctly implemented according to the Visual Refresh specs
Bumping manifests a=b2g-bump