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

========

https://hg.mozilla.org/integration/gaia-central/rev/f44d375949cf
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #15867 from bebef1987/lock_cam

xfail Bug 965806 - test_lockscreen_unlock_to_camera_with_passcode

========

https://hg.mozilla.org/integration/gaia-central/rev/1d5ca8621a43
Author: Bebe <bebe@mozilla.ro>
Desc: Bug 965806 - test_lockscreen_unlock_to_camera_with_passcode
Bumping manifests a=b2g-bump