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

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https://hg.mozilla.org/integration/gaia-central/rev/92928ba989e2
Author: Albert <acperez@tid.es>
Desc: Merge pull request #20489 from acperez/bug-1022433

Bug 1022433 - Browser's domain-not-found message is missing the domain name.

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https://hg.mozilla.org/integration/gaia-central/rev/7cb15e556a4a
Author: Albert <acperez@tid.es>
Desc: Bug 1022433 - Browser's domain-not-found message is missing the domain name.
Bumping manifests a=b2g-bump