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

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https://hg.mozilla.org/integration/gaia-central/rev/fd60711c2295
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #22064 from crdlc/bug-1041291-v2

Bug 1041291 v2

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https://hg.mozilla.org/integration/gaia-central/rev/e876aa7a401b
Author: crdlc <crdlc@tid.es>
Desc: Bug 1041291 - [Vertical Homescreen] Load drag-drop lazily
Bumping manifests a=b2g-bump