Msys2 Makefile.meson: Packages named "win64" regardless of arch
Msys2 Makefile.meson hardcodes "win64" as the arch-part of the package name. That's not right, e.g., for win32 builds.
Msys2 Makefile.meson hardcodes "win64" as the arch-part of the package name. That's not right, e.g., for win32 builds.