Mark as x86-specific: unconditionally includes files with amd64 code:
/wrkdirs/usr/ports/security/nflib/work/NFLlib-1.0.0-23-g5cf40ed/lib/prng/nfl_crypto_stream_salsa20_amd64_xmm6.s:343: Error: unrecognized opcode: `mov'
Approved by: portmgr (tier-2 blanket)