C 1.49_05/CC 1.16: strip binary BM chunk from bad comppad names

Workaround an upstream B bug < 5.8.8.
repro with some pads in Carp::trust and Socket::_fake_getaddrinfo
t/testcc.sh 91

if the length of the name > 100 and < 5.8.8 and the name contains \0
(forbidden < 5.16), strip it.