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

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https://hg.mozilla.org/integration/gaia-central/rev/1a92a507a2b0
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #15839 from jaoo/964216-followup

Bug 964216 - follow-up: fix getEnv issue r=julien

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https://hg.mozilla.org/integration/gaia-central/rev/025501f1bc5f
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 964216 - follow-up: fix getEnv issue
Bumping manifests a=b2g-bump