Added subpackage built by jdk8 to allow looking into jdk8 apps

- for some reason, jdk8 vm can not look into jdk11 vm, even if agent is correctly jdk8 version
- the config is still share, which is stupid, but I doubt there is another target audeince then me

java-runtime-decompiler8

@@ -0,0 +1,94 @@
+#!/usr/bin/bash
+
+# java runtime decompiler launch script
+
+# JPackage Project <http://www.jpackage.org/>
+# Source functions library
+echo "Special jdk8 build of JRD. "
+echo "You will most likely set agent manually to java-runtime-decompiler-jdk8/decompiler-agent8.jar"
+echo "Normal, jdk11 JRD should be able to reuse jdk8 agent, but not the oposite"
+echo "No one can guarantee the bytecode level of decompilers. You may need to download older versions from somewhere"
+
+if [ "x$JAVA_HOME" = "x" ] ; then
+  export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk
+fi
+
+. /usr/share/java-utils/java-functions
+
+# identify directory tree
+JRD=`java-runtime-decompiler`
+CONF_HOME=$XDG_CONFIG_HOME
+
+
+if  [ "$CONF_HOME" = "" ] ; then 
+  CONF_HOME=$HOME/.config/$JRD
+
+else
+  CONF_HOME=$CONF_HOME/$JRD
+
+fi
+
+LOG_DIR=$CONF_HOME/logs
+
+CONF_DIR=$CONF_HOME/conf
+
+# create directory tree
+PLUGIN_HOME=$CONF_HOME/plugins
+
+mkdir -p $LOG_DIR
+
+mkdir -p $CONF_DIR
+
+mkdir -p $PLUGIN_HOME
+
+: ${MAIN_CLASS:=org.jrd.backend.data.Main}
+
+# set java and jvm arguments
+export _prefer_jre=false
+_set_java_home
+set_jvm
+
+# all dependencies must be on classpath
+set_classpath byteman google-gson
+CLASSPATH=$CLASSPATH:${JAVA_HOME}/lib/tools.jar:/usr/share/java/java-runtime-decompiler-jdk8/runtime-decompiler8.jar:/usr/share/java/java-runtime-decompiler-jdk8/decompiler-agent8.jar
+
+# set path to agent automatically
+AGENT="/usr/share/java/java-runtime-decompiler/decompiler-agent8.jar"
+CONFIG_FILE=$CONF_DIR/config.cfg
+AGENT_PREFIX="AGENT_PATH==="
+AGENT_STRING=$AGENT_PREFIX$AGENT
+
+# copy json wrappers information to home so the users can edit
+CP_FILES="$(ls /etc/$JRD/plugins/*.json)"
+for cpfile in $CP_FILES; do
+    FILE_NAME="$(basename -- $cpfile)"
+	if [ ! -e "$PLUGIN_HOME/$FILE_NAME" ]
+	then
+		cp $cpfile $PLUGIN_HOME
+	else
+		echo "Configuration files were not copied for $FILE_NAME - the existing configuration would be overwritten." >&2
+	fi
+done
+
+# create config file and add agent default path
+touch $CONFIG_FILE
+
+if [ -e $AGENT ]
+then
+	if grep -Fxq $AGENT_STRING $CONFIG_FILE
+	then
+		echo "Default agent path is already set in $CONFIG_FILE. Skipping agent path setting." >&2
+	elif grep -rq $AGENT_PREFIX $CONFIG_FILE
+	then
+		RESULT_OF_GREP="$(grep -rq $AGENT_PREFIX $CONFIG_FILE)"
+		echo "Agent path is already set in $CONFIG_FILE as ${RESULT_OF_GREP}. Skipping agent path setting." >&2
+	else
+		echo  $AGENT_STRING >> $CONFIG_FILE
+
+	fi
+else
+	echo "Agent was not found and agent path was not set correctly. This has to be done manually in the decompiler GUI, or set AGENT_PATH===path_to_agent_jar in the configuration file: $CONFIG_FILE" >&2
+fi
+
+export FLAGS="$FLAGS -Djdk.attach.allowAttachSelf=true"
+run   "$@"