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

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https://hg.mozilla.org/integration/gaia-2_1/rev/1e09b0ccb6c3
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #25614 from chirarobert/uplift_home

Bug 1090092 - Add test for activating 4 column layout on homescreen

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https://hg.mozilla.org/integration/gaia-2_1/rev/74d1d402bd21
Author: Robert Chira <robertchira@P5075.(none)>
Desc: Bug 1090092 - Add test for activating 4 column layout on homescreen
Bumping manifests a=b2g-bump