Use the Windows short path names to make MINGW happy

Windows creates are short path name for each folder that contains spaces or special characters. If we use the that MINGW can compile files from such paths.
Use the -w flag for make to print the current directory

OMCompiler/Compiler/scripts/Compile.bat

@@ -22,7 +22,7 @@ REM It is not certain that release OMC is installed
 if not %OMDEV%a==a set MINGW=%OMDEV%\tools\msys\%OM_PLATFORM%
 REM echo OPENMODELICAHOME = %OPENMODELICAHOME% >> %1.log 2>&1
 REM echo MINGW = %MINGW% >>%1.log 2>&1
-set CURRENT_DIR="%CD%"
+call :CONVERT_TO_SHORT_PATH_NAME "%CD%"
 
 if %LOGGING%==1 (goto :SET_PATH_LOG) else (goto :SET_PATH)
 
@@ -106,7 +106,7 @@ goto :Final
 :MINGW
 REM echo "MINGW"
 if "%4"=="parallel" set ADDITIONAL_ARGS=-j%NUM_PROCS%
-if %LOGGING%==1 (%MinGW%\bin\mingw32-make -f %1.makefile %ADDITIONAL_ARGS%  >> %1.log 2>&1) else (%MinGW%\bin\mingw32-make -f %1.makefile %ADDITIONAL_ARGS%)
+if %LOGGING%==1 (%MinGW%\bin\mingw32-make -w -f %1.makefile %ADDITIONAL_ARGS%  >> %1.log 2>&1) else (%MinGW%\bin\mingw32-make -w -f %1.makefile %ADDITIONAL_ARGS%)
 set RESULT=%ERRORLEVEL%
 if %LOGGING%==1 echo RESULT: %RESULT% >> %1.log 2>&1
 goto :Final
@@ -115,3 +115,6 @@ goto :Final
 set PATH=%OLD_PATH%
 set OLD_PATH=
 @%COMSPEC% /C exit %RESULT%
+
+:CONVERT_TO_SHORT_PATH_NAME
+set CURRENT_DIR=%~s1