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

========

https://hg.mozilla.org/integration/gaia-central/rev/71bd21029249
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Merge pull request #25459 from etiennesegonzac/bug-1088104

Bug 1088104 - Using real |actions.flick| in system marionette js tests r=kgrandon

========

https://hg.mozilla.org/integration/gaia-central/rev/a7f0dbb82bb2
Author: Etienne Segonzac <etienne@segonzac.info>
Desc: Bug 1088104 - Using real |actions.flick| in system marionette js tests
Bumping manifests a=b2g-bump