Bumping gaia.json for 4 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/d30adbb24c0d
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Merge pull request #13518 from bebef1987/936364

bug 936364 Address test_settings_wallpaper.py intermittent

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https://hg.mozilla.org/integration/gaia-1_2/rev/227780e3bcbf
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: bug 936364 Address test_settings_wallpaper.py intermittent

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https://hg.mozilla.org/integration/gaia-1_2/rev/85b133b88c2a
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Merge pull request #13506 from AndreiH/bug935433_1.2

Bug 935433 - Merge test_clock_all_items_present_new_alarm assertions int...

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https://hg.mozilla.org/integration/gaia-1_2/rev/f97244298814
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 935433 - Merge test_clock_all_items_present_new_alarm assertions into existing tests