Enable install log capture

Bug in the code that caused the install log file to not be bundled into the tar.gz file. 
Specifically line 130:
      cp $LOGFILE /tmp/$uuid/ 2&>> /dev/null
It seems to have upset cp. Replace /dev/null with a real file and you see:
      cp: target `2' is not a directory
Changed lines 130-132 to use a simpler redirect.