Include <string.h> for memcpy()

Author: wantehchang

src/looprestoration_tmpl.c

@@ -29,6 +29,7 @@
 
 #include <stdint.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "common/attributes.h"
 #include "common/bitdepth.h"