fix qemu networking issue

app/emulation/qemu/ympbuild

@@ -23,7 +23,8 @@ cd $name-$version
 setup () {
     ./configure --prefix=/usr \
         --libdir=/usr/lib64/ \
-        --target-list=x86_64-softmmu \
+        --enable-slirp \
+        --target-list=x86_64-softmmu,aarch64-linux-user,aarch64-softmmu \
         --disable-zstd \
         $(use_opt gtk --enable-gtk --disable-gtk) \
         $(use_opt vnc --enable-vnc --disable-vnc)