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

========

https://hg.mozilla.org/integration/gaia-central/rev/1944d79e407f
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Merge pull request #12732 from jmcanterafonseca/fix_tel_merge

Bug 924064 - [Contacts] Two entries are created for the same number with...

========

https://hg.mozilla.org/integration/gaia-central/rev/2d3bb9e798d7
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 924064 - [Contacts] Two entries are created for the same number with and without country code when merging with a contact imported from SIM