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

========

https://hg.mozilla.org/integration/gaia-central/rev/090c8de8ca1c
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #21849 from steveck-chung/bug-1015390

Bug 1015390 - [SMS] Implement new startup loading events r=julienw

========

https://hg.mozilla.org/integration/gaia-central/rev/01d72446b272
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 1015390 - [SMS] Implement new startup loading events
Bumping manifests a=b2g-bump