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

========

https://hg.mozilla.org/integration/gaia-central/rev/12b0aa583cfd
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #24373 from comoyo/bug1053647

Bug 1053647 - delete space when reverting an autocorrection and don't insert space when user selects a word suggestion. r=janjongboom

========

https://hg.mozilla.org/integration/gaia-central/rev/3e61f5f803e5
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1053647 - delete space when reverting an autocorrection and don't insert space when user selects a word suggestion
Bumping manifests a=b2g-bump