Oops, forgot to export PETITCOMPILER_DATA_DIRECTORY variable ...so Smalltalk code could not read it. Also fixed test for "include" scripts so they are not downloaded again when already downloaded.

@REM -------
@REM make using lcc compiler
@REM type lccmake, and wait...
@REM do not edit - automatically generated from ProjectDefinition
@REM -------
make.exe -N -f bc.mak -DUSELCC=1 %*