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

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https://hg.mozilla.org/integration/gaia-central/rev/ce8e42aa3688
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #24761 from steveck-chung/message-report-view-refresh-and-test

Bug 1021608 - [Messages] Report view visual refresh, r=julienw

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https://hg.mozilla.org/integration/gaia-central/rev/0a1a37ca7d14
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 1021608 - [Messages] Report view visual refresh, r=julienw
Bumping manifests a=b2g-bump