wine: add 64 bit build and nixpkgs configuration

The default release channel (stable/unstable) and the default
build (wine32/wine64/wineWow) can be customized via the "wine" key in config

pkgs/misc/emulators/wine/builder-wow.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+source $stdenv/setup
+
+unpackPhase
+patchPhase
+
+configureScript=$TMP/$sourceRoot/configure
+mkdir -p $TMP/wine-wow $TMP/wine64
+
+cd $TMP/wine64
+sourceRoot=`pwd`
+configureFlags="--enable-win64"
+configurePhase
+buildPhase
+# checkPhase
+
+cd $TMP/wine-wow
+sourceRoot=`pwd`
+configureFlags="--with-wine64=../wine64"
+configurePhase
+buildPhase
+# checkPhase
+
+eval "$preInstall"
+cd $TMP/wine64 && make install
+cd $TMP/wine-wow && make install
+eval "$postInstall"
+fixupPhase