Modified package target for windows platform to generate a ZIP archiv…

…e, instead of a TAR. Included with ZIP is the flag to convert LF to CRLF. (#4219)

Makefile

@@ -336,7 +336,7 @@ else
 	cp $(GOPATH)/bin/windows_amd64/platform.exe $(DIST_PATH)/bin # from cross-compiled bin dir
 endif
 	@# Package
-	tar -C dist -czf $(DIST_PATH)-$(BUILD_TYPE_NAME)-windows-amd64.tar.gz mattermost
+	cd $(DIST_ROOT) && zip -9 -r -q -l mattermost-$(BUILD_TYPE_NAME)-windows-amd64.zip mattermost && cd ..
 	@# Cleanup
 	rm -f $(DIST_PATH)/bin/platform.exe