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

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https://hg.mozilla.org/integration/gaia-central/rev/f41c4a6199eb
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Merge pull request #15446 from jimporter/music2-fix-tabs

Bug 960879 - [music2] Fix the tabs, r=dominickuo

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https://hg.mozilla.org/integration/gaia-central/rev/091249e2b73a
Author: Jim Porter <jporter@mozilla.com>
Desc: Bug 960879 - [music2] Fix the tabs
Bumping manifests a=b2g-bump