Don't enable the AppArmour security driver with LXC

The AppArmour driver does not currently have support for LXC
so ensure that when probing, it claims to be disabled
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

src/security/security_apparmor.c

@@ -328,7 +328,7 @@ AppArmorSetSecurityPCILabel(pciDevice *dev ATTRIBUTE_UNUSED,
 
 /* Called on libvirtd startup to see if AppArmor is available */
 static int
-AppArmorSecurityManagerProbe(const char *virtDriver ATTRIBUTE_UNUSED)
+AppArmorSecurityManagerProbe(const char *virtDriver)
 {
     char *template = NULL;
     int rc = SECURITY_DRIVER_DISABLE;
@@ -336,6 +336,9 @@ AppArmorSecurityManagerProbe(const char *virtDriver ATTRIBUTE_UNUSED)
     if (use_apparmor() < 0)
         return rc;
 
+    if (virtDriver && STREQ(virtDriver, "LXC"))
+        return rc;
+
     /* see if template file exists */
     if (virAsprintf(&template, "%s/TEMPLATE",
                                APPARMOR_DIR "/libvirt") == -1) {