Correctly handle '*' in /etc/filesystems

The /etc/filesystems file can contain a '*' on the last line to
indicate that /proc/filessystems should be tried next. We have
a check that this '*' only occurs on the last line. Unfortunately
when we then start reading /proc/filesystems, we mistakenly think
we've seen '*' in /proc/filesystems and fail

* src/lxc/lxc_container.c: Skip '*' validation when we're reading
  /proc/filesystems

src/lxc/lxc_container.c

@@ -700,7 +700,7 @@ retry:
         /*
          * /etc/filesystems is only allowed to contain '*' on the last line
          */
-        if (gotStar) {
+        if (gotStar && !tryProc) {
             lxcError(VIR_ERR_INTERNAL_ERROR,
                      _("%s has unexpected '*' before last line"),
                      fslist);