Bumping gaia.json for 2 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/bfb5423bb82c
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #13204 from lightsofapollo/enable-parallel-v1.2

Bug 917044 - Run gjslint, unit tests and integration tests in parallel

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https://hg.mozilla.org/integration/gaia-1_2/rev/51369f25cd69
Author: James Lal <james@lightsofapollo.com>
Desc: Bug 917044 - Run gjslint, unit tests and integration tests in parallel