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

========

https://hg.mozilla.org/integration/gaia-central/rev/86c925cd0293
Author: gitmai <mri@tid.es>
Desc: Merge pull request #14076 from gitmai/bug-942060-no-usage-data-and-graph

Bug 942060 -[Cost Control] There is no usage data and graph in usage app
r=salva

========

https://hg.mozilla.org/integration/gaia-central/rev/0c737e666f77
Author: mai <mri@tid.es>
Desc: Bug 942060 -[Cost Control] There is no usage data and graph in usage app