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

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https://hg.mozilla.org/integration/gaia-central/rev/0c0bb6f0a00f
Author: BavarianTomcat <tomcat@mozilla.com>
Desc: Revert "Bug 1091731 - Introduce gaia-select webcomponent." for bustage

This reverts commit 2bcd04b7c9576ac1a9c60387f4ee08865dda2c4d.
Bumping manifests a=b2g-bump