Makefile.groups: added app_ruby_proc to ruby group

src/Makefile.groups

@@ -137,7 +137,7 @@ mod_list_python3=app_python3 app_python3s
 mod_list_jsdt=app_jsdt
 
 # - modules depending on ruby library
-mod_list_ruby=app_ruby
+mod_list_ruby=app_ruby app_ruby_proc
 
 # - modules depending on geoip library
 mod_list_geoip=geoip