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

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https://hg.mozilla.org/integration/gaia-central/rev/425f08bf04b0
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13822 from askeing/940173

Bug 940173 - Unxfail test_ftu_skip_tour.py

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https://hg.mozilla.org/integration/gaia-central/rev/ed983d912a46
Author: askeing <askeing@gmail.com>
Desc: Bug 940173 - Unxfail test_ftu_skip_tour.py