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

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https://hg.mozilla.org/integration/gaia-central/rev/6c176a59313a
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #13020 from gitmai/bug-923152-group-non-latin-names-import

Bug 923152 - Group non-latin names on import contacts

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https://hg.mozilla.org/integration/gaia-central/rev/3beab33c5d1e
Author: mai <mri@tid.es>
Desc: Bug 923152 - Group non-latin names on import contacts