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

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https://hg.mozilla.org/integration/gaia-central/rev/ed41b30882dc
Author: Rex KM Lee <rexboy@mozilla.com>
Desc: Merge pull request #13574 from rexboy7/fix-bug920414

Bug 920414 - [Dialer][User Story] Show "call ended" message at the end of calls. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/cf70370d5c6f
Author: Rex Lee <rexboy@mozilla.com>
Desc: Bug 920414 - [Dialer][User Story] Show "call ended" message at the end of calls.