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

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https://hg.mozilla.org/integration/gaia-central/rev/adc922c62062
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #16527 from hfiguiere/bug962040

Bug 962040 - Catch errors to not break the JSON output r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/bd7da063af63
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 962040 - Catch errors to not break the JSON output. r=julienw

Also make sure VERBOSE is sent to stderr.

Add more verbosity to track where it might hang.
Bumping manifests a=b2g-bump