Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/a8b221aeef71
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16341 from KevinGrandon/bug_971268_search_browser_bookmarking

Bug 971268 - Enable bookmark icon for results launched from search app r=ran, amirn

========

https://hg.mozilla.org/integration/gaia-central/rev/6e68104d5923
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 971268 - Enable bookmark icon for results launched from search app

========

https://hg.mozilla.org/integration/gaia-central/rev/32f8793cd4df
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Bug 973232 - test_settings_wallpaper.py fails on TBPL/macos a=testonly r=me

========

https://hg.mozilla.org/integration/gaia-central/rev/e770e8f29a1f
Author: Zac Campbell <zcampbell@mozilla.com>
Desc: Revert "Bug 973232 - Address TBPL failure in test_settings_wallpaper with larger timeout r=me a=testonly"

This reverts commit 34fdeaace7e3e0b6a728c7af8ebba00ba8782977.
Bumping manifests a=b2g-bump