Fix build warnings in some test cases

Include stdlib.h to get declaration of exit(3)

ChangeLog

@@ -1,5 +1,10 @@
 2013-02-18  Siddhesh Poyarekar  <siddhesh@redhat.com>
 
+	* misc/tst-pselect.c: Include stdlib.h for declaration of exit.
+	* nptl/sysdeps/pthread/tst-timer.c: Likewise.
+	* nptl/tst-barrier4.c: Likewise.
+	* nptl/tst-robust7.c: Likewise.
+
 	* elf/Versions (ld): Add _dl_find_dso_for_object.
 	* elf/dl-addr.c (_dl_addr): Use _dl_find_dso_for_object.
 	* elf/dl-open.c (_dl_find_dso_for_object): New function.

misc/tst-pselect.c

@@ -4,6 +4,7 @@
 #include <unistd.h>
 #include <sys/select.h>
 #include <sys/wait.h>
+#include <stdlib.h>
 
 
 static volatile int handler_called;

nptl/sysdeps/pthread/tst-timer.c

@@ -22,6 +22,7 @@
 #include <stdio.h>
 #include <time.h>
 #include <unistd.h>
+#include <stdlib.h>
 
 
 static void

nptl/tst-barrier4.c

@@ -20,6 +20,7 @@
 #include <errno.h>
 #include <pthread.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 
 static pthread_barrier_t b1;

nptl/tst-robust7.c

@@ -20,6 +20,7 @@
 #include <pthread.h>
 #include <stdbool.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 
 static pthread_barrier_t b;