Fix config for patch releases

config.js

@@ -27,8 +27,8 @@ var config = {
   // community prefix of the firmware images
   community_prefix: 'gluon-ffs-',
   // firmware version regex
-  version_regex: "-((experimental|[0-9]+\.[0-9]+)[+][0-9]{4}-[0-9]{2}-[0-9]{2}-g\.[a-f0-9]+-s\.[a-f0-9]+-)",
-  prettyPrintVersionRegex: "((experimental|[0-9]+\.[0-9]+)[+][0-9]{4}-[0-9]{2}-[0-9]{2})", // removes +2017-09-13-g.d722c26-s.b0e5e48
+  version_regex: "-((experimental|[0-9]+\.[0-9]+(\.[0-9]+)?)[+][0-9]{4}-[0-9]{2}-[0-9]{2}-g\.[a-f0-9]+-s\.[a-f0-9]+-)",
+  prettyPrintVersionRegex: "((experimental|[0-9]+\.[0-9]+(\.[0-9]+)?)[+][0-9]{4}-[0-9]{2}-[0-9]{2})", // removes +2017-09-13-g.d722c26-s.b0e5e48
   // relative image paths and branch
   directories: {
     //'../gluon/stable/factory/': 'stable',