Bumping gaia.json for 1 gaia-1_2 revision(s) a=gaia-bump
Truncated some number of revisions since the previous bump.

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https://hg.mozilla.org/integration/gaia-1_2/rev/7818251142a6
Author: Dave Hunt <dave.hunt@gmail.com>
Desc: Bug 946644 - Update the unit and camera gaia-ui-tests for running on emulators. r=jgriffin