Bumping gaia.json for 1 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/752ced5b3cc3
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Revert "Bug 906756 - Algorithms for merging givenName and familyName changed."

This reverts commit 9e737ce855b02ab60a9ab8b87f6a1d6ffa1a191c.