- Add string.h for --enable-picky build.

This commit was SVN r8307.

opal/util/crc.c

@@ -21,6 +21,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <strings.h>
+#include <string.h>
 #include <unistd.h>
 #include "opal/util/crc.h"