getrlimit/getrlimit01.c: cleanup

cleanup the getrlimit01.c

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
getrlimit/getrlimit01.c: add some new test

add new test for getrlimit(2):
RLIMIT_MSGQUEUE
RLIMIT_NICE
RLIMIT_RTPRIO
RLIMIT_RTTIME
RLIMIT_SIGPENDING

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>