Update to new empack mount points

Author: martinRenou

include/pyjs/pre_js/load_pkg.js

@@ -260,6 +260,7 @@ Module["bootstrap_from_empack_packed_environment"] = async function
         // fetch json with list of all packages
         let empack_env_meta = await fetchJson(packages_json_url);
         let all_packages = empack_env_meta.packages;
+        let all_mount_points = empack_env_meta.mounts;
         let prefix = empack_env_meta.prefix;
 
         if(verbose){
@@ -285,6 +286,7 @@ Module["bootstrap_from_empack_packed_environment"] = async function
         if(verbose){
             console.log("fetchAndUntarAll");
         }
+        await Promise.all(all_mount_points.map(pkg => fetchAndUntar(package_tarballs_root_url, python_is_ready_promise, pkg, verbose)));
         let shared_libs = await Promise.all(packages.map(pkg => fetchAndUntar(package_tarballs_root_url, python_is_ready_promise, pkg, verbose)));
 
         if(verbose){