FreeBSD package updates

- Change license to reflect latest ports bsd.licenses.db.mk
- Add 'pkgconfig' BUILD time dependency
- Still no luck with gcov support (libprofile_rt.a) has some
  build issues - still disabled
- Make sure not to install in '/usr' - FreeBSD requires ports
  to be installed at '/usr/local'
Merge pull request #9 from harshavardhana/master

FreeBSD package updates