tests: Create privileged driver config in qemuxml2argvtest

This is actually a proper setting since we're not checking
session-mode related XMLs.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

tests/qemuxml2argvtest.c

@@ -500,7 +500,7 @@ mymain(void)
         return EXIT_FAILURE;
     }
 
-    driver.config = virQEMUDriverConfigNew(false);
+    driver.config = virQEMUDriverConfigNew(true);
     VIR_FREE(driver.config->spiceListen);
     VIR_FREE(driver.config->vncListen);