Stop hiding the line that builds version.txt.

Don't know why it was hidden before, but can't think of a
reason, and the lack of makefile output showing its creation
just confused the heck out of me for 10 minutes ;-).

inst/WinBuilders/mk/zope.mk

@@ -65,7 +65,7 @@ $(BUILD_DIR)/lib/python/Zope2/version.txt: $(BUILD_DIR)/bin/python.exe
 	cd "$(SRC_DIR)/$(ZOPEDIRNAME)" && \
 		"$<" install.py install --no-compile --home=../../build \
 			--install-headers=../../build/bin/Include/nonsense
-	@echo Zope $(ZOPEVERSION) > $@
+	echo Zope $(ZOPEVERSION) > $@
 	$(TOUCH) $@
 
 # This merely unpacks the Zope tarball.