[Issue 23193] druntime/win32.mak, win64.mak, posix.mak contain no instructions for how to build druntime

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23193

--- Comment #10 from Walter Bright <bugzilla at digitalmars.com> ---
I still have no clue even what make program is required. The \dm\bin\make.exe
does not work anymore with win64.mak.

I'm tempted to just delete win64.mak and make a new one.

--