DownloadJDKs: Further investigate

jdks/download-jdks.sh

@@ -96,7 +96,7 @@ function unpack_mac_jdk {
         #install_xar
         #./xar-1.5.2/src/xar -xf JDK*/JDK*.pkg
         ls -lsh
-        7z x JDK*.pkg 
+        7z x JDK*/JDK*.pkg 
         ls -lsh
         cd jdk1*.pkg
         ls -lsh