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

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https://hg.mozilla.org/integration/gaia-central/rev/d41f285add9d
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #12138 from caiolima/bug-907652

Bug 907652 - warning when we click on a notification but we have a message in composer r=julien

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https://hg.mozilla.org/integration/gaia-central/rev/e8e28820bc92
Author: Caio Lima <ticaiolima@gmail.com>
Desc: Bug 907652 - Implemented a warning about dircard the current message to open a new one