Commit a few missing header files, etc.

This commit was SVN r19626.

orte/test/mpi/concurrent_spawn.c

@@ -1,6 +1,8 @@
 #define _GNU_SOURCE
 #include <stdio.h>
 #include <sys/types.h>
+#include <unistd.h>
+#include <stdlib.h>
 
 #include <mpi.h>
 

orte/test/mpi/hello_nodename.c

@@ -5,7 +5,9 @@
  * The most basic of MPI applications
  */
 
+#define _GNU_SOURCE
 #include <stdio.h>
+#include <unistd.h>
 #include "mpi.h"
 
 int main(int argc, char* argv[])

orte/test/mpi/hello_show_help.c

@@ -6,6 +6,7 @@
  */
 
 #include <stdio.h>
+#include <unistd.h>
 #include "mpi.h"
 
 #include "orte/util/show_help.h"

orte/test/mpi/segv.c

@@ -6,6 +6,7 @@
  */
 
 #include <stdio.h>
+#include <unistd.h>
 #include "mpi.h"
 
 int main(int argc, char* argv[])

orte/test/mpi/simple_spawn.c

@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 #include <mpi.h>
 

orte/test/mpi/spawn_multiple.c

@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 #include <mpi.h>