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

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https://hg.mozilla.org/integration/gaia-central/rev/6a65311b8639
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Merge pull request #12767 from jmcanterafonseca/fix_924400

Bug 924400 - A no name contact imported from the SIM card does not allow...

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https://hg.mozilla.org/integration/gaia-central/rev/beec993f2ca6
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 924400 - A no name contact imported from the SIM card does not allow to find duplicates