Added www.suddeutsche.de to the key_mobile_sites list

BUG=157916

Review URL: https://chromiumcodereview.appspot.com/11299261

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170429 0039d316-1c4b-4281-b951-d872f2087c98

tools/perf/page_sets/key_mobile_sites.json

@@ -351,6 +351,12 @@
             "scrolling": {
                 "action": "scrolling_interaction"
             }
+        },
+        {
+            "url": "http://www.sueddeutsche.de",
+            "scrolling": {
+                "action": "scrolling_interaction"
+            }
         }
     ]
 }