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

========

https://hg.mozilla.org/integration/gaia-central/rev/f1340323e729
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #19288 from rnowm/gaia-buttons

Bug 1010990 - (gaia-buttons) Create gaia-buttons web component r=wilsonpage

========

https://hg.mozilla.org/integration/gaia-central/rev/91faca30ec5b
Author: rnowm <arnau@arnaumarch.com>
Desc: Bug 1010990 - (gaia-buttons) Create gaia-buttons web component
Bumping manifests a=b2g-bump