Misc: win32 sources now preserved in release tarballs.

This makes it possible to build nginx under Windows from release tarballs
instead of using source code repository.

misc/GNUmakefile

diff --git a/misc/GNUmakefile b/misc/GNUmakefile
index 8f839b4..6895317 100644
--- a/misc/GNUmakefile
+++ b/misc/GNUmakefile
@@ -15,12 +15,6 @@
 
 	mv $(TEMP)/$(NGINX)/auto/configure $(TEMP)/$(NGINX)
 
-	# delete incomplete sources
-	rm $(TEMP)/$(NGINX)/src/event/ngx_event_acceptex.c
-	rm $(TEMP)/$(NGINX)/src/event/ngx_event_connectex.c
-	rm $(TEMP)/$(NGINX)/src/event/modules/ngx_iocp_module.*
-	rm -r $(TEMP)/$(NGINX)/src/os/win32
-
 	mv $(TEMP)/$(NGINX)/docs/text/LICENSE $(TEMP)/$(NGINX)
 	mv $(TEMP)/$(NGINX)/docs/text/README $(TEMP)/$(NGINX)
 	mv $(TEMP)/$(NGINX)/docs/html $(TEMP)/$(NGINX)