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/7141e450e7f0
Author: AndreiH <andrei.hutusoru@gmail.com>
Desc: Merge pull request #15113 from viorelaioia/bug_957545_1.3

[v1.3] Bug 957545 - Disable test_dialer_add_contact because it's erroring on every run

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https://hg.mozilla.org/integration/gaia-1_3/rev/3c71b822f657
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: [v1.3] Bug 957545 - Disable test_dialer_add_contact because it's erroring on every ru