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

========

https://hg.mozilla.org/integration/gaia-central/rev/ee7126fb6032
Author: punamdahiya <punamdahiya@yahoo.com>
Desc: Merge pull request #16312 from dominickuo/bug-972742

Bug 972742 - [Music] Handle mozNfc api correctly

========

https://hg.mozilla.org/integration/gaia-central/rev/ad61b22f4dbb
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Bug 972742 - [Music] Handle mozNfc api correctly
Bumping manifests a=b2g-bump