library <STAT>: exclude an #include for --disable-numa

When the numa stuff was imported from the top program,
that #include for dlopen() was not made conditional as
it should have been. Well, here it is being corrected.

Signed-off-by: Jim Warner <james.warner@comcast.net>

proc/stat.c

@@ -16,7 +16,9 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
+#ifndef NUMA_DISABLE
 #include <dlfcn.h>
+#endif
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>