Odd -- this seems to compile without "util/output.h" manually, but

several test builds failed tonight without it.  [shrug]

This commit was SVN r2591.

src/tools/mpirun/mpirun2.c

@@ -18,6 +18,7 @@
 #include "runtime/runtime.h"
 #include "util/session_dir.h"
 #include "include/constants.h"
+#include "util/output.h"
 
 #include <stdio.h>
 #include <unistd.h>