openbse: sysupgrade testing

Author: Mizux

ci/vagrant/openbsd/Vagrantfile

@@ -82,7 +82,9 @@ Vagrant.configure("2") do |config|
   # maintained by openBSD -> older registry have been shutdown.
   config.vm.provision "env", type: "shell", inline:<<-SHELL
   set -x
-  sysupgrade
+  sysupgrade || true
+  sysupgrade -r 7.7 || true
+  sysupgrade -r https://ftp.usa.openbsd.org/pub/OpenBSD//7.7/packages/amd64/ || true
   pkg_add -u
   pkg_add git cmake
   SHELL