Bumping gaia.json for 2 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/16a47000c37d
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Merge pull request #13623 from AndreiH/bug936533_1.2

Bug 936533 - test_settings_bluetooth.py is failing, please fix

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https://hg.mozilla.org/integration/gaia-1_2/rev/a0a4b14c1e25
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 936533 - test_settings_bluetooth.py is failing, please fix