[VirtualBox/f30] (5 commits) ...Update VBox to 6.0.12

Summary of changes: 50fc90f... - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass (*) 00ecd80... Fixes warning with: "It's not recommended to have unversion (*) fafddca... Rebuild for python-3.8 (*) f535689... tweak patch for python-3.8 (*) 701bf54... Update VBox to 6.0.12 (*) (*) This commit already existed in another branch; no separate mail sent