tests: Add 50-sim-hash_collision test

tests: Add 50-sim-hash_collision test

libseccomp utilizes a hash table to manage BPF blocks.  It
currently employs MurmurHash3 where the key is the hashed values
of the BPF instruction blocks, the accumulator start, and the
accumulator end.  This test was added because of a mishandled
hash collision reported by Tor in GitHub issue #148.
* https://github.com/seccomp/libseccomp/issues/148

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>