Correct problems in raptorinstallermaker.py: ensure missing directories' names are printed rather than %s when checking Win32 support directory, and remove final reliance on SBS_HOME environment variable (use only the value passed to the -s switch).

#!/usr/bin/env python
"A script for invoking coverage from the command line."

import sys
del sys.path[0] # Otherwise "import coverage" finds this file!
import coverage

coverage.the_coverage.command_line(sys.argv[1:])