test: Add printing header

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

test/test-counter.c

@@ -9,6 +9,8 @@ int main(int argc, char *argv[])
 {
 	int counter = 0;
 
+	printf("%s pid %d\n", argv[0], getpid());
+
 	while (1) {
 		printf("Pid: %10d Counter: %10d\n",
 		       getpid(), counter++);

test/test-rnd-from-file.c

@@ -13,6 +13,8 @@ int main(int argc, char *argv[])
 	const int limit = 10;
 	int counter, fd, rnd;
 
+	printf("%s pid %d\n", argv[0], getpid());
+
 	unlink((char *)fname_rnd);
 
 	fd = open(fname_rnd, O_RDWR | O_CREAT | O_EXCL, 0644);