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

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https://hg.mozilla.org/integration/gaia-2_1/rev/5d35249db698
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #24431 from viorelaioia/bug_1072343_v2.1

Bug 1072343 - Improve wait in test_camera_flash_modes.py

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https://hg.mozilla.org/integration/gaia-2_1/rev/d84783f73994
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1072343 - Improve wait in test_camera_flash_modes.py
Bumping manifests a=b2g-bump