[css-fonts-3]Updated issues-cr-2017.yaml

Author: svgeesus

css-fonts-3/issues-cr-2017.yaml

@@ -290,6 +290,7 @@ issue:
       - 'https://github.com/w3c/csswg-drafts/issues/1531#issuecomment-358384560'
     tag: []
     resolved: nochange
+    authorResponse: 'https://github.com/w3c/csswg-drafts/issues/1531#issuecomment-362272221'
   - shown: []
     id: '23'
     summary: Serialization of font properties when system font is specified