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

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https://hg.mozilla.org/integration/gaia-central/rev/8de6a5d4a9bb
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #17319 from crdlc/bug-984399

Bug 984399 - Contacts list is not properly updated when importing a new ...

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https://hg.mozilla.org/integration/gaia-central/rev/943dccf9c45f
Author: crdlc <crdlc@tid.es>
Desc: Bug 984399 - Contacts list is not properly updated when importing a new FB Friend
Bumping manifests a=b2g-bump