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

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https://hg.mozilla.org/integration/gaia-central/rev/4524d04a4e0e
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #13639 from jmcanterafonseca/dialer_sugg_fb

Bug 854908 - Suggestions from Dialer should also include FB Contacts

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https://hg.mozilla.org/integration/gaia-central/rev/03b5fe034430
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 854908 - Suggestions from Dialer should also include FB Contacts