Moved the generation of the release metadata entry for the MD5 zip outside of the parallel section, so it can't co-incide with the zipping of the binaries. Ensured that any errors generated when merging log files are not just hidden by putting them in the output file (which will render it not well-formed XML).

@echo off
setlocal
if not defined HELIUM_HOME set HELIUM_HOME=%~dp0..\..\..\..\helium
echo %HELIUM_HOME%
rem call ..\..\build\env.bat
call %HELIUM_HOME%\hlm.bat %*
endlocal