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/f78dee635047
Author: AndreiH <andrei.hutusoru@gmail.com>
Desc: Merge pull request #15645 from viorelaioia/bug_962935_v1.3

Bug 962935 - [v1.3] Unxfail test_cost_control_data_alert_mobile.py

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https://hg.mozilla.org/integration/gaia-1_3/rev/3e3e6b6c59ee
Author: askeing <askeing@gmail.com>
Desc: Bug 962935 - Unxfail test_cost_control_data_alert_mobile.py