[Fix Pattern] Don't use mmap for getting bad addr

[hukoyu]

tst_get_bad_addr() in LTP tests will get bad address using mmap. As mmap is not fully supported the test fails here, so replaced the bad address with 0 ( as anything other than good is a bad address) and is serving our purpose.
Ref: lsds/sgx-lkl#647

- test_cases[n].pathname = tst_get_bad_addr(cleanup);
+ test_cases[n].pathname = 0;

LTP Tests fixed with this approach: (Count: 22)

write05
unlink07
statx03
stat03
sigpending02
open08
mkdir03
mknod06
link04
preadv202
readv02
pwritev202
lchown02
rmdir02
chmod06
chroot03
creat06
clock_adjtime02
clock_gettime02
clock_settime02
truncate03
fremovexattr02