emulators/wine: Configure without Core Audio support

Core Audio is Apple-specific and should never trigger on FreeBSD.
Still explicitly configure --without-coreaudio in the spirit of
deterministic builds, independent of packages that happen to be
installed on the build system.

This back ports bd28318975c42f2b4469ff27e211c8f8f8a56ac2 from the
wine-devel port.