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

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https://hg.mozilla.org/integration/gaia-central/rev/5f1beded85ad
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Merge pull request #14856 from AndreiH/test_music_other_formats

Bug 949084 - Music app test - play an 3gp audio file via Songs view

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https://hg.mozilla.org/integration/gaia-central/rev/b00cae35291a
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 949084 - Music app test - play an 3gp audio file via Songs view