ports/151747: request to enable emulators/wine on amd64

[Gerald Pfeifer]

Addendum:  I believe doing this with a specific port for amd64, at least 
initially is a good idea, and making this a slave port of emulators/wine
so that things like constantly changing pkg-plist and general updates
come for free.  I am also happy to make adjustments to that port, as long
as the "uglier" pieces remain in the slave port itself.

Gerald
k