[apparmor] [Merge] ~u-d/apparmor-profiles:thunderbird/launcher into apparmor-profiles:master

[intrigeri]

> So what are the AppArmor guidelines for these merge/separate usr exactly?

If I got Simon's explanation right: use alternations like /{usr/,}bin/xyz for stuff that's typically shipped in /bin or /lib (in order to support merged-/usr), and don't bother about stuff that's typically shipped in /usr already.
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https://code.launchpad.net/~u-d/apparmor-profiles/+git/apparmor-profiles/+merge/320276
Your team AppArmor Developers is requested to review the proposed merge of ~u-d/apparmor-profiles:thunderbird/launcher into apparmor-profiles:master.