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

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https://hg.mozilla.org/integration/gaia-central/rev/34e7bdf32eaf
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #12896 from bobsilverberg/remove_HERE_maps_test

Bug 927458 - Remove test_homescreen_launch_here_maps.py as it is unlikely to be returned to the build, r=zac

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https://hg.mozilla.org/integration/gaia-central/rev/70623ca605d2
Author: Bob Silverberg <bob.silverberg@gmail.com>
Desc: Bug 927458 - Remove test_homescreen_launch_here_maps.py as it is unlikely to be returned to the build, r=zac