Fixed missing cleanup

git-svn-id: https://svn.inf.ethz.ch/svn/lecturers/a2/trunk@7676 8c9fc860-2736-0410-a75d-ab315db34111

tools/builds/a2/makefile

@@ -58,4 +58,4 @@ oberon: build
 
 clean:
 	@rm -f modules dependencies build *.SymU *.GofU *.Log *.log
-	@rm -rf Linux32G Win32G
+	@rm -rf Linux32G Win32G Win64G