Accepting request 959502 from home:dfaggioli:experimental:Virtualization

- Build PPC firmwares from sources on non-PPC builds as well (bsc#1193545)
- Build RiscV firmwares on non-RiscV builds as well
- While there, refactor (and simplify!) the firmware building logic and code
  * Patches added:
     Makefile-define-endianess-for-cross-buil.patch
- Include vmxcap in the qemu-tools package (is being very useful for debugging bsc#1193364)
- The qemu package should require qemu-x86, qemu-arm, etc, as there's no point installing it without _any_ of them. Additionally, right now, the user does not get a working qemu, if recommended packages are disabled (e.g., on MicroOS or SLE Micro). bsc#1196087
- Give clearer instructions on how to modify the package patches from the output of update_git.sh (docs change only, no functional change)
- qemu,kvm: potential privilege escalation via virtiofsd (bsc#1195161, CVE-2022-0358)
  * Patches added:
     virtiofsd-Drop-membership-of-all-supplem.patch

OBS-URL: https://build.opensuse.org/request/show/959502
OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=691

update_git.sh

@@ -1049,8 +1049,10 @@ else # not LATEST
             bundle2local &> ~/pkg2git.log
             echo "SUCCESS"
             echo "To modify package patches, use the frombundle branch as the basis for updating"
-            echo "the $GIT_BRANCH branch with the new patch queue."
-            echo "Then export the changes back to the package using update_git.sh git2pkg"
+            echo "the $GIT_BRANCH branch with the new patch queue, e.g., like this:"
+            echo "  git checkout -f --recurse-submodules -B $GIT_BRANCH frombundle"
+            echo "Then make your changes and, when done, export them back to the package with:"
+            echo "  bash ./update_git.sh git2pkg"
             ;;
         refresh )
             echo "Updating the spec file and patches from the spec file template and the bundle"