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

========

https://hg.mozilla.org/integration/gaia-central/rev/a267130735fa
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #13696 from Neeraj-Seth/bug-811624_lock_pass

Bug 811624 - [Fugu][Buri][SETTINGS] "Lock Screen" should not be able to ... r=crh0716

========

https://hg.mozilla.org/integration/gaia-central/rev/ca2026e7eeff
Author: FirefoxHCL <neeraj_kumar@hcl.com>
Desc: Bug 811624 - [Fugu][Buri][SETTINGS] "Lock Screen" should not be able to turn off if "Passcode Lock" is on