Changes.txt in autobuild-1.5.19 vs Changes.txt in autobuild-1.5.20

@@ -1,4 +1,7 @@
+== Version 1.5.20
+* cmake: inform the user if a CMake configuration value gets changed
+
 == Version 1.5.19
 * git: fix cases where the importer was assuming that a branch did not exist
   while it was
 * orogen: import_types_from accepts arguments for loading files. Be compatible
   with that.