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

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https://hg.mozilla.org/integration/gaia-central/rev/cbc4ff9727fa
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #24065 from mcav/outbox-show-msgs

Bug 1063540 - Manual setup error message when IMAP and SMTP settings are... r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/dfd43422f8a8
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 1063540 - Manual setup error message when IMAP and SMTP settings are wrong. r=asuth
Bumping manifests a=b2g-bump