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

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https://hg.mozilla.org/integration/gaia-1_3/rev/3098415227ad
Author: russnicoletti <rnicoletti@mozilla.com>
Desc: Merge pull request #17931 from russnicoletti/bug988037

Bug 988037 - [B2G][Video] WebM videos attached in email do not display properly when previewed in email app r=johu

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https://hg.mozilla.org/integration/gaia-1_3/rev/24074d57dd28
Author: Russ Nicoletti <rnicoletti@mozilla.com>
Desc: Bug 988037 - [B2G][Video] WebM videos attached in email do not display properly when previewed in email app
Bumping manifests a=b2g-bump