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

========

https://hg.mozilla.org/integration/gaia-central/rev/69b852b83ed4
Author: Yi-Fan Liao <yliao@mozilla.com>
Desc: Merge pull request #26212 from begeeben/1092948_cant_turn_to_landscape_master

Bug 1092948 - [FFOS2.0][Woodduck][Browser]Can't turn to landscape mode o...

========

https://hg.mozilla.org/integration/gaia-central/rev/57031b7e65de
Author: Yi-Fan Liao <begeeben@gmail.com>
Desc: Bug 1092948 - [FFOS2.0][Woodduck][Browser]Can't turn to landscape mode on editing bookmark screen when add bookmark to Home screen

* Remove incorrect orientation setting in manifest.webapp
Bumping manifests a=b2g-bump