Bumping gaia.json for 2 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/161c88b22b32
Author: AndreiH <andrei.hutusoru@softvision.ro>
Desc: Merge pull request #16291 from chirarobert/v1.3_unxfail_data_alert

Unxfail test_cost_control_data_alert_mobile.py because Bug 971696 was fi...

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https://hg.mozilla.org/integration/gaia-1_3/rev/fd91f1a1f614
Author: chirarobert <chirarobert@yahoo.com>
Desc: Unxfail test_cost_control_data_alert_mobile.py because Bug 971696 was fixed.