selftests/clone3: skip if clone3() is ENOSYS

If the clone3() syscall is not implemented we should skip the tests.

Fixes: 41585bbeee ("selftests: add tests for clone3() with *set_tid")
Fixes: 17a810699c ("selftests: add tests for clone3()")
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

tools/testing/selftests/clone3/clone3.c

@@ -131,6 +131,7 @@ int main(int argc, char *argv[])
 
 	uid_t uid = getuid();
 
+	test_clone3_supported();
 	ksft_print_header();
 	ksft_set_plan(17);