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

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https://hg.mozilla.org/integration/gaia-central/rev/21dadcc13619
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Revert "Bug 1114560 - Add a test to delete the whole phone number on the dialer"

This reverts commit 69bd4c80954e3ba48f8ce71f24939108f1e69829.
Bumping manifests a=b2g-bump