use mx to find build native-image

Author: ahgamut

scripts/build-envmap-example.bash

@@ -27,9 +27,12 @@ check_vars () {
 main () {
     check_vars
     #
-    NATIMG_PATH="$BASELOC/testing/graal/vm/latest_graalvm_home"
     COSMOCC_BIN="$BASELOC/testing/cosmopolitan/cosmocc/bin"
     export PATH="$NATIMG_PATH/bin:$COSMOCC_BIN:$BASELOC/testing/mx:$PATH"
+
+    cd "$BASELOC/testing/graal/vm"
+    NATIMG_PATH="$(mx -c 1 --dy /substratevm graalvm-home)"
+    echo "natimg is at? $NATIMG_PATH"
     LABS_LIBDIR="$BASELOC/build/labs-$ARCH-cosmo-libs"
 
     if [ x"$ARCH" = x"x86_64" ]; then

scripts/build-native-image.bash

@@ -45,6 +45,7 @@ main () {
     mx clean
     mx -c 1 --dy /substratevm --native-images=native-image graalvm-show
     mx -c 1 --dy /substratevm --native-images=native-image build
+    mx -c 1 --dy /substratevm graalvm-home
 
     cd "$BASELOC"
 }