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

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https://hg.mozilla.org/integration/gaia-central/rev/9d1930d6b33c
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #12926 from wanderview/ftu-navigation-test

Bug 928069: Use shared mock_icc_helper.js in FTU test.  r=fcampo

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https://hg.mozilla.org/integration/gaia-central/rev/cfe9f9af11db
Author: Ben Kelly <ben@wanderview.com>
Desc: Bug 928069: Use shared mock_icc_helper.js in FTU test.