sendfile08: disable this test on kernel less than 2.6.33

After kernel commit cc56f7d, sendfile(2) can support any file refered
"out_fd" instead of only socket.
Since this test for general file refered "out_fd", so we disable this
test on the kernel less than 2.6.33.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Reviewed-by: Jan Stancek <jstancek@redhat.com>
Acked-by: Cyril Hrubis <chrubis@suse.cz>
diff --git a/testcases/kernel/syscalls/sendfile/sendfile08.c b/testcases/kernel/syscalls/sendfile/sendfile08.c
index 3d4caa3..72bcdf7 100644
--- a/testcases/kernel/syscalls/sendfile/sendfile08.c
+++ b/testcases/kernel/syscalls/sendfile/sendfile08.c
@@ -95,6 +95,13 @@
 {
 	int ret;
 
+	/* Disable test if the version of the kernel is less than 2.6.33 */
+	if ((tst_kvercmp(2, 6, 33)) < 0) {
+		tst_resm(TCONF, "The out_fd must be socket before kernel");
+		tst_resm(TCONF, "2.6.33, see kernel commit cc56f7d");
+		tst_exit();
+	}
+
 	TEST_PAUSE;
 
 	tst_tmpdir();