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/0b64497528e9
Author: AndreiH <andrei.hutusoru@gmail.com>
Desc: Merge pull request #13851 from bobsilverberg/home

Bug 921424 - Replace wait for landing page after unlocking with wait for displayed app to be homescreen

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https://hg.mozilla.org/integration/gaia-1_2/rev/c00050a293b9
Author: Ana Hristova <ana.nikolaeva@gmail.com>
Desc: Bug 921424 - Replace wait for landing page after unlocking with wait for displayed app to be homescreen