Added -av switch to .g4 compilation scripts so an alternative antlr version...

Added -av switch to .g4 compilation scripts so an alternative antlr version can be specified other than default 4.3
Signed-off-by: Miklos Magyari <miklos.magyari@sigmatechnology.se>

Tools/antlr4_compile.cmd

@@ -11,10 +11,26 @@
 @rem #
 @rem ###############################################################################
 
+@echo off
+
+@set ANTLR_VERSION=4.3
+
+:loop
+@if not "%1"=="" (
+    @if "%1"=="-av" (
+        @set ANTLR_VERSION=%2
+        @shift
+    )
+    @shift
+    @goto :loop
+)
+
+@echo Using antlr version %ANTLR_VERSION%
+
 @set CURDIR=%cd%
 @set DIR=%~dp0
 @set WORKSPACE_PATH=%DIR%\..
-@set ANTLR=-cp %HOMEDRIVE%%HOMEPATH%\lib\\antlr-4.3-complete.jar org.antlr.v4.Tool
+@set ANTLR=-cp %HOMEDRIVE%%HOMEPATH%\lib\\antlr-%ANTLR_VERSION%-complete.jar org.antlr.v4.Tool
 
 @cd %WORKSPACE_PATH%\org.eclipse.titan.runtime\src\org\eclipse\titan\runtime\core\cfgparser\
 @java %ANTLR% RuntimeCfgLexer.g4 -no-listener -no-visitor -encoding UTF-8 -package org.eclipse.titan.runtime.core.cfgparser

Tools/antlr4_compile.sh

@@ -21,7 +21,24 @@
 set -e
 set -o pipefail
 
-ANTLR4="java -classpath $HOME/lib/antlr-4.3-complete.jar org.antlr.v4.Tool"
+ANTLR_VERSION=4.3
+
+while :
+do
+        case $1 in
+            -av)
+                ANTLR_VERSION=$2
+                shift
+                ;;
+            *)
+                break;
+        esac
+        shift
+    done
+
+ANTLR4="java -classpath $HOME/lib/antlr-${ANTLR_VERSION}-complete.jar org.antlr.v4.Tool"
+
+echo Using antlr version $ANTLR_VERSION
 
 # script directory
 # http://stackoverflow.com/questions/59895/can-a-bash-script-tell-which-directory-it-is-stored-in