Merge pull request #9178 from shintaro-iwasaki/pr/fix_mpirun_errno

tools/mpirun: include errno.h explicitly

Author: jsquyres

ompi/tools/mpirun/main.c

@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <errno.h>
 #if HAVE_SYS_STAT_H
 #    include <sys/stat.h>
 #endif /* HAVE_SYS_STAT_H */