Launch qemu with a USB XHCI controller and USB tablet device

Rsconscript

@@ -125,6 +125,6 @@ task "run", desc: "Run HOS in QEMU" do
   Dir.mktmpdir do |tmpdir|
     img = hello_env.expand("^/hos.img")
     FileUtils.cp(img, tmpdir)
-    sh %W[qemu-system-x86_64 -bios OVMF.fd -drive file=#{tmpdir}/hos.img,format=raw]
+    sh %W[qemu-system-x86_64 -bios OVMF.fd -drive file=#{tmpdir}/hos.img,format=raw -device qemu-xhci -device usb-tablet]
   end
 end