Fix macOS build with JDK 17 & 18.

(This fixes building the package only. #515 prevents it from actually working.)

Author: LeviticusMB

find_java_libdir.sh

@@ -49,7 +49,7 @@ main () {
     target_arch=`uname -m`
     if [[ -d ${jre_dir}/${target_arch}/classic ]]; then lib_dir="${jre_dir}"/${target_arch}/classic; else lib_dir="${jre_dir}"/${target_arch}/server; fi
   elif [[ "${os}" == "mac" ]]; then
-    lib_dir="${jre_dir}/jli"
+    if [[ -d ${jre_dir}/jli ]]; then lib_dir="${jre_dir}/jli"; else lib_dir="${jre_dir}"; fi
   else
     local arch
     if [[ "${target_arch}" =~ (32|386) ]]; then