Find vmrun on Windows.

gns3server/modules/qemu/qemu_vm.py

@@ -698,8 +698,9 @@ class QemuVM(BaseVM):
                     raise QemuError("Could not find free port for the Qemu monitor: {}".format(e))
 
             self._command = yield from self._build_command()
+            command_string = " ".join(self._command)
             try:
-                log.info("Starting QEMU: {}".format(self._command))
+                log.info("Starting QEMU with: {}".format(command_string))
                 self._stdout_file = os.path.join(self.working_dir, "qemu.log")
                 log.info("logging to {}".format(self._stdout_file))
                 with open(self._stdout_file, "w", encoding="utf-8") as fd: