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

========

https://hg.mozilla.org/integration/gaia-central/rev/5091e06b0a87
Author: gitmai <mri@tid.es>
Desc: Merge pull request #14527 from gitmai/bug-948304-remove-mindgap-reference

Bug 948304 - [Cost control] Remove reference to mindgap.js library
r=salva

========

https://hg.mozilla.org/integration/gaia-central/rev/d4c40ce775d1
Author: mai <mri@tid.es>
Desc: Bug 948304 - [Cost control] Remove reference to mindgap.js library