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

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https://hg.mozilla.org/integration/gaia-central/rev/b16d64030c86
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #25861 from npark-mozilla/1093874_2ndAttempt

Bug 1093874 2nd attempt

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https://hg.mozilla.org/integration/gaia-central/rev/81a036e6303e
Author: No-Jun Park <mozilla@No-Jun-MacBook-Pro.local>
Desc: Bug 1093874 - Create new test cases for loading a mix of valid/invalid image files into Gallery

This test tests the loading of various different image file types, and also checks that invalid image files are not displayed in the thumbnail view, and does not crash the Gallery app

referencing the image author
Bumping manifests a=b2g-bump