[master] missing header file to fix build failure for sunstudio

okayed on jabber, pushing directly.

src/lib/acl/tests/sockaddr.h

@@ -18,6 +18,7 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
+#include <string.h>
 
 #include <exceptions/exceptions.h>