add MacPorts build

Tested on Mac OS 10.9.4 with Macports 2.3.1
Both ncurses and tiles builds are OK.

But with another patch: #8338 
`-L$(shell ncursesw5-config --libdir)` may become `-L/opt/local/lib`

I'm not sure if the option above will conflict with the future versions. It's just a dirty hack for me. :p