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

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https://hg.mozilla.org/integration/gaia-central/rev/27b44ba228ff
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #12996 from lightsofapollo/xfail-test_delete_contact.py

xfail delete test

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https://hg.mozilla.org/integration/gaia-central/rev/ea75cee13f0d
Author: James Lal <james@lightsofapollo.com>
Desc: xfail delete test