Update buildtools.bat

Author: mmicko

x86/buildtools.bat

@@ -23,7 +23,7 @@ rem ember that we get here even in command.com.
 if NOT EXIST %WD%opt\bin\CmdInit.cmd  %WD%usr\bin\touch.exe > %WD%opt\bin\CmdInit.cmd 
 
 if NOT EXIST %WD%msys-2.0.dll set WD=%~dp0usr\bin\
-set MSYSTEM=MINGW64
+set MSYSTEM=MINGW32
 set MINGW32=/mingw32
 set MINGW64=/mingw64
 set PATH=%PATH%;.