Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/f8b7a1077742
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #11095 from jmcanterafonseca/sim_import_dedup

Bug 894870 - SIM import needs to support contact dedup

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https://hg.mozilla.org/integration/gaia-central/rev/a86d7899cf17
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 894870 - SIM import needs to support contact dedup