Add run-vb task

Rsconscript

@@ -144,3 +144,7 @@ task "run", desc: "Run HOS in QEMU" do
     sh %W[qemu-system-x86_64 -bios OVMF.fd -drive file=#{tmpdir}/HOS.img,format=raw -device qemu-xhci -device usb-tablet]
   end
 end
+
+task "run-vb", desc: "Run HOS in VirtualBox" do
+  sh %W[VBoxManage startvm HOS]
+end