Fix Windows tests for long paths in `exec:environment:...`
This commit makes `Win32OperatingSystemTests >> testExec...`
more robust by testing the error code rather than text of
the exception which may change.
@REM -------
@REM make using mingw gnu compiler
@REM type mingwmake, and wait...
@REM do not edit - automatically generated from ProjectDefinition
@REM -------
@SET DEFINES=
@REM Kludge got Mercurial, cannot be implemented in Borland make
@FOR /F "tokens=*" %%i in ('hg root') do SET HGROOT=%%i
@IF "%HGROOT%" NEQ "" SET DEFINES=%DEFINES% "-DHGROOT=%HGROOT%"
@pushd ..\..\rules
@call find_mingw.bat
@popd
make.exe -N -f bc.mak %DEFINES% %USEMINGW_ARG% %*