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

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https://hg.mozilla.org/integration/gaia-2_0/rev/8102fea071ae
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #24033 from alivedise/bugzilla/1064157_v2.0/v2

Bug 1064157 - Put homescreen at background while cardview is shown. r=timdream

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https://hg.mozilla.org/integration/gaia-2_0/rev/619d652bbd16
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1064157 - Put homescreen at background while cardview is shown.
Bumping manifests a=b2g-bump