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

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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

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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