tests/pc.c: use libtests
tests/pc.c: use libtests

* tests/pc.c (main): Use assert, get_page_size, perror_msg_and_fail,
and perror_msg_and_skip.

cuviper/strace,Saruta/strace,cuviper/strace,Saruta/strace,Saruta/strace,cuviper/strace,cuviper/strace,Saruta/strace,Saruta/strace,cuviper/strace