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

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https://hg.mozilla.org/integration/gaia-central/rev/14ddf1cf578c
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #20816 from gaye/bug-1027717-volo

Bug 1027717 - Use package manager in calendar r=millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/a5d7ad7a9cbd
Author: gaye <gaye@mozilla.com>
Desc: Bug 1027717 - Use package manager in calendar
Bumping manifests a=b2g-bump