[cvs-nhc98] Fix hmake and hmake-config to work properly when built wit

[Malcolm Wallace]

malcolm: Sat Mar  1 21:10:40 CET 2003

Update of /usr/src/master/nhc/src/hmake
In directory hinken:/tmp/cvs-serv21868

Modified Files:
	Argv.hs Config.hs Makefile MkConfig.hs PackageConfig.hs 
	RunAndReadStdout.hs 
Added Files:
	Platform.hs 
Log Message:
Fix hmake and hmake-config to work properly when built with Cygwin/ghc.
All the usual suspects:
  * \ vs / as directory separator
  * ; vs : as PATH separator
  * compiler binaries end in .exe
  * don't assume the existence of /tmp