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

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https://hg.mozilla.org/integration/gaia-central/rev/7fbae472175a
Author: Luke Chang <lchang@mozilla.com>
Desc: Merge pull request #22829 from luke-chang/1047475_sms_reset_scrollbar

Bug 1047475 - [Messages] The suggestions panel scroll position should be reset after it's been hidden, r=steveck-chung

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https://hg.mozilla.org/integration/gaia-central/rev/3bd2595b0708
Author: Luke Chang <lchang@mozilla.com>
Desc: Bug 1047475 - [Messages] The suggestions panel scroll position should be reset after it's been hidden
Bumping manifests a=b2g-bump