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

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https://hg.mozilla.org/integration/gaia-central/rev/c7edf4a52437
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #14842 from crdlc/bug-949373-v2

Bug 949373 - [Download Manager] What is the correct notification stopped...

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https://hg.mozilla.org/integration/gaia-central/rev/613dd8341ed3
Author: crdlc <crdlc@tid.es>
Desc: Bug 949373 - [Download Manager] What is the correct notification stopped downloads?