lxc: don't setup cpuset.mems if memory mode in numatune is not 'strict'

If the memory mode in numatune is not 'strict', we should not setup
cpuset.mems. Before commit 1a7be8c6
we have checked the memory mode in virDomainNumatuneGetNodeset. This
patch adds the check as before.
Signed-off-by: NWang Rui <moon.wangrui@huawei.com>

src/lxc/lxc_cgroup.c

@@ -79,6 +79,10 @@ static int virLXCCgroupSetupCpusetTune(virDomainDefPtr def,
             goto cleanup;
     }
 
+    if (virDomainNumatuneGetMode(def->numatune, -1) !=
+        VIR_DOMAIN_NUMATUNE_MEM_STRICT)
+        goto cleanup;
+
     if (virDomainNumatuneMaybeFormatNodeset(def->numatune, nodemask,
                                             &mask, -1) < 0)
         goto cleanup;