Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/5914be9c24a0
Author: Yuren Ju <yurenju@gmail.com>
Desc: Merge pull request #11750 from yurenju/909190

Bug 909190 - xulrunner doesn't be uncompressed to correect directory on ... r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/06f4ef74ed1f
Author: Yuren Ju <yurenju@gmail.com>
Desc: Bug 909190 - xulrunner doesn't be uncompressed to correect directory on windows