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

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https://hg.mozilla.org/integration/gaia-central/rev/1bb11f6f0877
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Merge pull request #23132 from asutherland/email-unread-msgs-fix

Bug 800402 - [email] UI: Show the number of unread messages in the message-list header after the folder name. back-end fix-up. r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/f693ef8d786b
Author: Andrew Sutherland <asutherland@asutherland.org>
Desc: Bug 800402 - [email] UI: Show the number of unread messages in the message-list header after the folder name. back-end fix-up. r=asuth

propagating the GELAM fix:
https://github.com/mozilla-b2g/gaia-email-libs-and-more/pull/330
Bumping manifests a=b2g-bump