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

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https://hg.mozilla.org/integration/gaia-central/rev/1d05c815645a
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #16268 from gaye/bug-972631

Bug 972631 - Disable caldav_test.js on TBPL

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https://hg.mozilla.org/integration/gaia-central/rev/a32360105e28
Author: Gareth Aye <gaye@mozilla.com>
Desc: Bug 972631 - Disable caldav_test.js on TBPL
Bumping manifests a=b2g-bump