scripts/python/Makefile.am: restore definition of PYNUT_COMMON_CODE (empty) for recipe to be fully defined [networkupstools#2792]

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

Author: jimklimov

scripts/python/Makefile.am

@@ -69,6 +69,9 @@ NUT_MONITOR_COMMON = \
 	app/locale/it/LC_MESSAGES/NUT-Monitor.mo \
 	app/locale/ru/LC_MESSAGES/NUT-Monitor.mo
 
+# Reserved for shipping additional modules or scripts "as is"
+PYNUT_COMMON_CODE =
+
 PYNUT_COMMON_MISC = \
 	module/README.adoc