Update to Wine 4.0, the actual release, with essentially no real changes
from the last RC. This will shortly move to the main emulators/wine port,
but let's give it a bit of time and wider exposure first.

Forward port r491148 | gerald | 2019-01-25:

Add a new option, GCC, that controls the use of GCC instead of the
system compiler (usually clang these days) as we have been doing since
r334935 in 2013-11-26. And make that the default, both since there've
been user reports about Wine not working properly with the toolchain
in FreeBSD 12 and since there may be other challenges given that both
upstream and in other distributions GCC is being used all along. [1]

PR: 231010 [1]
Reviewed by: mat [1]
Tested by: sbruno [1]