Add HAVE_CONFIG_H support to let files receive configure defines.

cpukit/libmd/md4.c

@@ -27,6 +27,10 @@
 **   -- You can print out the digest using MDprint(&MD)
 */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 /* Implementation notes:
 ** This implementation assumes that ints are 32-bit quantities.
 */

cpukit/libmd/md5.c

@@ -33,6 +33,10 @@
  ***********************************************************************
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <string.h>	/* memcpy */
 
 #include "md5.h"