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

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https://hg.mozilla.org/integration/gaia-2_1/rev/594ab2798881
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #26671 from albertopq/v2.1-1090859

Bug 1090859 - Fixing race condition between applications.ready and SIM dialog

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https://hg.mozilla.org/integration/gaia-2_1/rev/d8df07066209
Author: albertopq <albert.pastor@gmail.com>
Desc: Bug 1090859 - Fixing race condition between applications.ready and SIM dialog
Bumping manifests a=b2g-bump