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

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https://hg.mozilla.org/integration/gaia-central/rev/bb3fda71acc5
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Merge pull request #27054 from RickyChien/Bug-1116406

Bug 1116406 - Run specific test-file when executing build unit/integration on tests r=@cctuan

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https://hg.mozilla.org/integration/gaia-central/rev/cb7748438af7
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Bug 1116406 - Run specific test-file when executing build unit/integration tests
Bumping manifests a=b2g-bump