Fix builds on Solaris. Missing errno.h file.

This commit was SVN r20516.

orte/mca/plm/base/plm_base_rsh_support.c

@@ -10,6 +10,7 @@
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
  * Copyright (c) 2007      Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2009      Sun Microsystems, Inc.  All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -24,6 +25,7 @@
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif
+#include <errno.h>
 #include <signal.h>
 #include <ctype.h>