configure: Rename the main binary to "wine32" for the Wow64 build.
diff --git a/configure.ac b/configure.ac
index a38c525..e186872 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1595,6 +1595,9 @@
     ;;
 esac
 
+AC_SUBST(MAIN_BINARY,"wine")
+test -z "$with_wine64" || MAIN_BINARY="wine32"
+
 case $host_cpu in
   *i[[3456789]]86*)
     case $host_os in