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

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https://hg.mozilla.org/integration/gaia-2_1/rev/a085b0487ed1
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #25916 from jrburke/bug1093398-v2.1-email-account-serial-action

Bug 1093398 v2.1 - [Email] New account page appears again after tapping next r=asuth a=fabrice

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https://hg.mozilla.org/integration/gaia-2_1/rev/1666d92dd40b
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1093398 v2.1 - [Email] New account page appears again after tapping next
Bumping manifests a=b2g-bump