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

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https://hg.mozilla.org/integration/gaia-central/rev/d2c94fe940e8
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #21214 from RudyLu/music/Bug1032037-disable_playerTest_travis

Bug 1032037 - perma-red on Travis for Music player tests - Playback.
r=dominickuo

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https://hg.mozilla.org/integration/gaia-central/rev/f39a7858234a
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1032037 - perma-red on Travis for Music player tests - Playback
tests.
 - Disable to music player test on Travis.
Bumping manifests a=b2g-bump