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

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https://hg.mozilla.org/integration/gaia-central/rev/116689e7d37c
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #14954 from kaichih/Bug-953008

Bug 953008 - NO_FTU variable typo in makefile r=@yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/6427d8e0061d
Author: Hu Kai-Chih <khu@Hus-MacBook-Air.local>
Desc: Bug 953008 - NO_FTU variable typo in makefile