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

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https://hg.mozilla.org/integration/gaia-central/rev/0c12ef1bc157
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #11143 from jmcanterafonseca/fb_match_and_link

Bug 895824 - while importing FB Contacts automatically link with local c...

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https://hg.mozilla.org/integration/gaia-central/rev/248d3954b47c
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 895824 - while importing FB Contacts automatically link with local contact if there is a matching