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

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https://hg.mozilla.org/integration/gaia-central/rev/901001ddff7c
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #26340 from mwargers/capture3

Bug 1086662 - Add a test that ensures test_camera_capture_video.py saves...

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https://hg.mozilla.org/integration/gaia-central/rev/bd74ca871cfc
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1086662 - Add a test that ensures test_camera_capture_video.py saves a video file of a minimum size
Bumping manifests a=b2g-bump