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

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https://hg.mozilla.org/integration/gaia-2_1/rev/d1fa80dab7df
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #25178 from albertopq/uplift-2.1-1078904

Bug 1078904 - Activities menu on fullscreen_layout landscape

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https://hg.mozilla.org/integration/gaia-2_1/rev/c45bd3371b99
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1078904 - Activities menu on fullscreen_layout landscape
Bumping manifests a=b2g-bump