testcases/kernel/syscalls: clean up old style prototypes

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/testcases/kernel/syscalls/close/close08.c b/testcases/kernel/syscalls/close/close08.c
index 151fc0a..3d0c507 100644
--- a/testcases/kernel/syscalls/close/close08.c
+++ b/testcases/kernel/syscalls/close/close08.c
@@ -172,7 +172,7 @@
 	tst_exit();
 }
 
-void setup()
+void setup(void)
 {
 
 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
@@ -184,7 +184,7 @@
 	sprintf(fname, "tfile_%d", getpid());
 }
 
-void cleanup()
+void cleanup(void)
 {
 	TEST_CLEANUP;