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

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https://hg.mozilla.org/integration/gaia-central/rev/589c7f5a9c9c
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #23226 from nullaus/bug1055352

bug 1055352 - Do not process finalized state changes in the downloads li...

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https://hg.mozilla.org/integration/gaia-central/rev/f2c3d75b2756
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: bug 1055352 - Do not process finalized state changes in the downloads list. r=crdlc
Bumping manifests a=b2g-bump