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/84452407cc61
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #14275 from bobsilverberg/xfail_eme_install

Bug 945368 - [v1.2] Xfail test_everythingme_app_install.py due to long_press bug

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https://hg.mozilla.org/integration/gaia-1_2/rev/90033c78eceb
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Bug 945368 - [v1.2] Xfail test_everythingme_app_install.py due to long_press bug