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

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https://hg.mozilla.org/integration/gaia-central/rev/b40322eb5327
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #20853 from gaye/resurrect-server-tests

Bug 1028628 - Run existing calendar interop tests against radicale r=evanxd, millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/6b89195f5936
Author: gaye <gaye@mozilla.com>
Desc: Run existing calendar interop tests against radicale
Bumping manifests a=b2g-bump