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

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https://hg.mozilla.org/integration/gaia-1_4/rev/a58c76ed93e6
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #17414 from KevinGrandon/bug_986282_travis_to_1dot4

Bug 986282 - Add travis to 1.4 r=lightsofapollo

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https://hg.mozilla.org/integration/gaia-1_4/rev/a6cbf77f413a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 986282 - Add travis to 1.4
Bumping manifests a=b2g-bump