Autogen.bat for windows to download models

autogen.bat

+@echo off
+REM Run this to set up the build system: configure, makefiles, etc.
+
+setlocal enabledelayedexpansion
+
+REM Parse the real autogen.sh script for version
+for /F "tokens=4 delims= " %%A in ('findstr "download_model.sh" autogen.sh') do (
+    set "model=%%A"
+)
+REM Remove trailing ")" character from the model variable
+set "model=%model:~0,-1%"
+
+cd lpcnet
+call download_model.bat %model%
+cd ..
+
+echo Updating build configuration files, please wait....