Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/32b20a270495
Author: Carsten Book -Tomcat- <cbook@mozilla.com>
Desc: Revert "Bug 986753 - [Tarako] Alarm Clock can get killed in the background and never ring." for suspicion of breaking gaia integration tests

This reverts commit 77b9f9e9b55801fec784dc20167c9d2a40e5346b.
Bumping manifests a=b2g-bump