Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/2261b0e93a72
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #11697 from lightsofapollo/evanxd-bug-900894

Bug 900894 - Add a integration test for sending email via IMAP.

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https://hg.mozilla.org/integration/gaia-central/rev/521b2f9bd7ec
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 900894 - Add a integration test for sending email via IMAP.