Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b6f067f97d7c
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Revert "Merge pull request #19809 from mikehenrty/bug-908300-withutils"

This reverts commit f37e71daf1d1dc4b4ed05e711301e145d8b281aa, reversing
changes made to 13d001b8a352312f2015c4e3da933ff6b067bd1d.

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https://hg.mozilla.org/integration/gaia-central/rev/8564e663b187
Author: gitmai <mri@tid.es>
Desc: Merge pull request #16665 from gitmai/bug-977077-module-sim-manager

Bug 977077 -[Cost Control] New module Sim Manager
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/cf03660ffdf6
Author: mai <mri@tid.es>
Desc: Bug 977077 -[Cost Control] New module Sim Manager
Bumping manifests a=b2g-bump