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

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https://hg.mozilla.org/integration/gaia-2_0/rev/3c413af60f90
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #21773 from lissyx/bug1030063_2.0

Bug 1030063 - Use Notification API for CaptivePortal

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https://hg.mozilla.org/integration/gaia-2_0/rev/3503d3e98501
Author: Alexandre Lissy <lissyx+github@lissyx.dyndns.org>
Desc: Bug 1030063 - Use Notification API for CaptivePortal
Bumping manifests a=b2g-bump