6366222 zdb(1M) needs to use largefile primitives when reading label

[eric.schr...@sun.com]

Author: eschrock
Repository: /hg/onnv/onnv-gate
Revision: e5f70a6fc5010aa205f244a25a9cdb950e0dae89
Log message:
6366222 zdb(1M) needs to use largefile primitives when reading label
6366267 zfs broke non-BUILD64 compilation of libsec

Files:
        update: usr/src/cmd/zdb/zdb.c
        update: usr/src/lib/libsec/Makefile