Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b0e241b8ac01
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1037716 - Disable intermittent failing test | TEST-UNEXPECTED-FAIL | /builds/slave/test/gaia/apps/ringtones/test/marionette/manage_test.js | Ringtone management Manage ringtones Create new ringtone

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https://hg.mozilla.org/integration/gaia-central/rev/b2f43aa49e72
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21639 from KevinGrandon/bug_1033858_update_node_modules

Bug 1033858 - Update gaia node modules for dependency updates

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https://hg.mozilla.org/integration/gaia-central/rev/c93d68ee8ba6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1033858 - Update gaia node modules for dependency updates
Bumping manifests a=b2g-bump