Fixed changelog reference commit

An old reference commit was used which has to be updated because
a manual change to the .changes file on obs was done :(

helper/update_changelog.py

@@ -86,6 +86,9 @@
         log_lines = gitlog.readlines()
 
 if arguments['--since']:
+    # append empty commit to prevent loosing log data if
+    # only one commit of change was found
+    log_lines.append(b'commit')
     # Iterate over log data and convert to changelog format
     for line_data in log_lines:
         line = line_data.decode(encoding='utf-8')
@@ -131,11 +134,11 @@
     for author_date in reversed(sorted(log_data.keys())):
         if date_reference:
             if date_reference < author_date:
-                sys.stdout.write(log_data[author_date])
+                sys.stdout.write(log_data[author_date] + os.linesep)
             else:
                 skip_list.append(author_date)
         else:
-            sys.stdout.write(log_data[author_date])
+            sys.stdout.write(log_data[author_date] + os.linesep)
 else:
     for line_data in log_lines:
         line = line_data.decode(encoding='utf-8')

package/suse-migration-sle15-activation.changes.ref

@@ -1,9 +1,9 @@
-commit cc3f0b43dabc45166559953c037dc1fa68ec40af
-Author:     Marcus Schäfer <ms@suse.de>
-AuthorDate: Thu May 2 15:14:31 2019 +0200
-Commit:     Marcus Schäfer <ms@suse.de>
-CommitDate: Thu May 2 15:14:31 2019 +0200
+commit 9c1d0f22bfe3e74975fe76a50b8029d5a7325a52
+Author:     Jesus Bermudez Velazquez <jesus.bv@suse.com>
+AuthorDate: Tue Aug 20 11:39:04 2019 +0100
+Commit:     Jesus Bermudez Velazquez <jesus.bv@suse.com>
+CommitDate: Tue Aug 20 11:39:04 2019 +0100
 
     Reference commit for SUSE maintenance
 
-    This submission creates a reference to fate#327175 and bsc#1133919
+    Fix BYOS upgrade from 12SP4-SAP to 15 (BSC#1142108)