Bumping gaia.json for 3 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/0d6b56ffbc53
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #11441 from gaye/bug-894738

Bug 894738 - Redirect appropriately from ViewEvent after tapping system notification for event alarm pulls us into calendar r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/7ea6f6a44d38
Author: gaye <gaye@mozilla.com>
Desc: Clean up patch and add unit tests

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https://hg.mozilla.org/integration/gaia-central/rev/c8e56697db00
Author: gaye <gaye@mozilla.com>
Desc: Bug 894738 - Redirect appropriately from ViewEvent after tapping system notification for event alarm pulls us into calendar