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

========

https://hg.mozilla.org/integration/gaia-1_4/rev/1ad21dc94e4e
Author: AndreiH <andrei.hutusoru@softvision.ro>
Desc: Merge pull request #18886 from chirarobert/v1.4_camera_fix

Bug 1004963 - Update camera tests

========

https://hg.mozilla.org/integration/gaia-1_4/rev/22f5f976297e
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 1004963 - Update camera tests
Bumping manifests a=b2g-bump
Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-1_4/rev/74aa3f3e63ea
Author: AndreiH <andrei.hutusoru@softvision.ro>
Desc: Merge pull request #18889 from chirarobert/v1.4_email_uplift

Bug 1003746 - Fix the tap_subject() method of email apps

========

https://hg.mozilla.org/integration/gaia-1_4/rev/0aa4223d9362
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 1003746 - Fix the tap_subject() method of email apps
Bumping manifests a=b2g-bump
Bumping manifests a=b2g-bump
Bumping manifests a=b2g-bump