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/30a0462e53f1
Author: Trif Andrei-Alin <trifandreialin@gmail.com>
Desc: Merge pull request #14127 from bobsilverberg/939062_v1.2

Bug 939062 - Part 2 address intermittent failure in test_add_contact_to_favorites.py

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https://hg.mozilla.org/integration/gaia-1_2/rev/23348a5052b6
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 939062 - Part 2 address intermittent failure in test_add_contact_to_favorites.py