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

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https://hg.mozilla.org/integration/gaia-central/rev/2fc36f9b2649
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #25296 from KevinGrandon/bug_1085139_remove_mocha_globals_again

Bug 1085139 - Remove new uses of mocha.globals

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https://hg.mozilla.org/integration/gaia-central/rev/b92c76a0ff38
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1085139 - Remove new uses of mocha.globals r=julienw
Bumping manifests a=b2g-bump