Bumping gaia.json for 2 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/d01549da139c
Author: Carmen Jiménez <cjc@tid.es>
Desc: Merge pull request #14456 from mcjimenez/bug944495_12

Merge pull request #14241 from mcjimenez/bug944495. Rebased for v1.2

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https://hg.mozilla.org/integration/gaia-1_2/rev/d0cfa84b55f2
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #14241 from mcjimenez/bug944495

Bug 944495 - Race condition when installing single variant apps(cherry picked from commit 573304f58bb431c3622a86786b5e17aaa65b07b9)

Conflicts:

	apps/homescreen/js/configurator.js
	apps/homescreen/js/grid.js