fcntl36: Do not pass char* pointer to tst_res() fmt

The format string has to be constant, passing pointers directly is a bad
practice that may result in security exploit and some build systems even
do not produce packages if such warning is found in the compiler logs.

Signed-off-by: Cyril Hrubis <[email protected]>

Author: metan-ucw

testcases/kernel/syscalls/fcntl/fcntl36.c

@@ -300,7 +300,7 @@ static void test_fn(void *f0(void *), void *f1(void *),
 	struct param p2[thread_cnt];
 	unsigned char buf[write_size];
 
-	tst_res(TINFO, msg);
+	tst_res(TINFO, "%s", msg);
 
 	if (tst_fill_file(fname, 1, write_size, thread_cnt + 1))
 		tst_brk(TBROK, "Failed to create tst file");