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

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https://hg.mozilla.org/integration/gaia-central/rev/c7db2bca85b9
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #11835 from kk1fff/b891443/p1

Bug 891443 - avoid redirecting every url started with https://www.mozilla.org in FTU, r=alive, a=leo+

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https://hg.mozilla.org/integration/gaia-central/rev/e3df5848deaa
Author: Patrick Wang <kk1fff@patrickz.net>
Desc: Bug 891443 - avoid redirecting every url started with https://www.mozilla.org in ftu