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

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https://hg.mozilla.org/integration/gaia-2_1/rev/e7f0f380339c
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #24401 from nullaus/bug1064975

bug 1064975 - Ensure enter/leaveTaskManager is called for all apps. r=sf...

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https://hg.mozilla.org/integration/gaia-2_1/rev/15ef99e46694
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: bug 1064975 - Ensure enter/leaveTaskManager is called for all apps. r=sfoster
Bumping manifests a=b2g-bump