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

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https://hg.mozilla.org/integration/gaia-central/rev/1cd60364dfec
Author: AndreiH <andrei.hutusoru@gmail.com>
Desc: Merge pull request #12642 from viorelaioia/bug_923402

removed the wait_for_favorite_list_not_displayed method

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https://hg.mozilla.org/integration/gaia-central/rev/3b8c18ab9de5
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 923402 - In test_fmradio_remove_from_favorite.py the remove method should wait for the favourite to be removed