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

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https://hg.mozilla.org/integration/gaia-2_0/rev/97f41322c0ab
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #22431 from nullaus/v2.0

Merge pull request #22372 from nullaus/bug1046565

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https://hg.mozilla.org/integration/gaia-2_0/rev/949058035f67
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #22372 from nullaus/bug1046565

bug1046565 - Add system.png 60x60 for notification purposes. Update refe...
(cherry picked from commit e43382bb9c0239e9062d69f4f9f9cf8e26d41a19)
Bumping manifests a=b2g-bump