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

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https://hg.mozilla.org/integration/gaia-central/rev/062f94bd5e0f
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Merge pull request #26941 from RickyChien/bug-1024047

Bug 1024047 - Support blacklist for test infrastructure of build system r=@cctuan

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https://hg.mozilla.org/integration/gaia-central/rev/b828ae61e2b1
Author: Ricky Chien <ricky060709@gmail.com>
Desc: Bug 1024047 - Support blacklist for test infrastructure of build system
Bumping manifests a=b2g-bump