* Add sys/wait.h so that we compile on OS X

This commit was SVN r2181.

src/tools/wrappers/wrap.cc

@@ -14,6 +14,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
+#include <sys/wait.h>
 #include <sys/stat.h>
 #include <unistd.h>
 #include <errno.h>