Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/8cbb212306fb
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #21559 from chuck-lee/bug-1019146

Bug 1019146 - Set default EAP mode in FTU to PEAP. r=fcampo a=2.0+
Bumping manifests a=b2g-bump