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

========

https://hg.mozilla.org/integration/gaia-central/rev/0073e3a93252
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Merge pull request #22943 from dmarcos/bug1050555

Bug 1050555 - [Camera] HDR indicator remains on screen in video mode, ph...

========

https://hg.mozilla.org/integration/gaia-central/rev/115c3a4f0e44
Author: Diego Marcos <diego.marcos@gmail.com>
Desc: Bug 1050555 - [Camera] HDR indicator remains on screen in video mode, phone enters unusable state, reboot required
Bumping manifests a=b2g-bump