Bumping gaia.json for 4 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/77e3d20b38ba
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #15562 from viorelaioia/bug_962052

Bug 962052 - [v1.3] Unxfail test_settings_passcode.py

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https://hg.mozilla.org/integration/gaia-1_3/rev/71ac5b8d1d81
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 962052 - [v1.3] Unxfail test_settings_passcode.py

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https://hg.mozilla.org/integration/gaia-1_3/rev/4a205372a450
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #15554 from viorelaioia/bug_962016

Bug 962016 - [v1.3] Xfail test_settings_change_keyboard_language with Bug 961731

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https://hg.mozilla.org/integration/gaia-1_3/rev/0bac5345722c
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 962016 - [v1.3] Xfail test_settings_change_keyboard_language with Bug 961731