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

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https://hg.mozilla.org/integration/gaia-central/rev/d4c4eaf32317
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Merge pull request #22088 from asutherland/email-text-inline

Bug 1038836 - [email/backend] Mailing list text/plain footers added (with a multipart/mixed container) to text/html parts are detected as unnamed attachments. r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/e5c856d3513c
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Bug 1038836 - [email/backend] Mailing list text/plain footers added (with a multipart/mixed container) to text/html parts are detected as unnamed attachments. r=asuth

land https://github.com/mozilla-b2g/gaia-email-libs-and-more/pull/322
Bumping manifests a=b2g-bump