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

========

https://hg.mozilla.org/integration/gaia-central/rev/2f42b3d93975
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #25042 from mikehenrty/bug-1074123-part2

Bug 1074123 - Fix update and quick settings dialogs

========

https://hg.mozilla.org/integration/gaia-central/rev/759970ea60aa
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Bug 1074123 - Fix update and quick settings dialogs
Bumping manifests a=b2g-bump