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

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https://hg.mozilla.org/integration/gaia-central/rev/4194b54f00c2
Author: Rex KM Lee <rexboy@mozilla.com>
Desc: Merge pull request #11503 from snowmantw/issue899002

Bug 899002 - Use one button dialog for CE audio warning r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/ee7e6ec19a07
Author: Greg Weng (snowmantw) <gweng@mozilla.com>
Desc: Bug 899002 - Use one button dialog for CE audio warning