OPAM binaries for armv6 on FreeBSD

OPAM binaries and OCaml 4.01.0 patches for FreeBSD10 running on a RaspberryPI.

$ clang -v
FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
Target: armv6--freebsd10.0-gnueabi
Thread model: posix

$ opam init --comp=4.01.0+armv6-freebsd

opam-1.1 is the released version of opam.

opam-1.2 is a pre-release version built from master on github with some performance improvements.