Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/f91b839cede9
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #25985 from cctuan/1094003

Bug 1094003 - [Text Selection] Pop-up menu UI improvement

========

https://hg.mozilla.org/integration/gaia-central/rev/fcb004ab9941
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1094003 - [Text Selection] Pop-up menu UI improvement

========

https://hg.mozilla.org/integration/gaia-central/rev/59c3383c368d
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #25979 from cctuan/941969

Bug 941969 - optimize JS for system app

========

https://hg.mozilla.org/integration/gaia-central/rev/069a5d364ef1
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 941969 - optimize JS for system app

========

https://hg.mozilla.org/integration/gaia-central/rev/b27b599c8765
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #25981 from KevinGrandon/bug_1095714_search_window_listener

Bug 1095714 - [SearchWindow] Remove SettingsListener on destroy +autoland

========

https://hg.mozilla.org/integration/gaia-central/rev/c7de0f0686f5
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1095714 - [SearchWindow] Remove SettingsListener on destroy r=alive
Bumping manifests a=b2g-bump