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

========

https://hg.mozilla.org/integration/gaia-central/rev/ea3056fce8b6
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #12562 from jmcanterafonseca/bug_name_export_salva

Bug 922248 - [Contacts] Cannot update a previously exported contact

========

https://hg.mozilla.org/integration/gaia-central/rev/ae460298a224
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 922248 - [Contacts] Cannot update a previously exported contact