test: Add VM's XML and VM's log into link-patterns

Capturing VM's xml and logs was implemented in [1], now it's time to
also include the in our link-patterns.

[1] cockpit-project/cockpit-machines#1158

test/common/link-patterns.json

@@ -25,5 +25,15 @@
         "label": "coverage",
         "pattern": "Code coverage report in ([A-Za-z0-9\\-\\.]+)$",
         "url": "$1/"
+    },
+    {
+        "label": "vm xml",
+        "pattern": "Wrote ([A-Za-z0-9\.\-]+) XML to ([A-Za-z0-9\\.\\-]+\\.xml)$",
+        "url": "$2"
+    },
+    {
+        "label": "vm log",
+        "pattern": "Wrote ([A-Za-z0-9\.\-]+) log to ([A-Za-z0-9\\.\\-]+\\.log)$",
+        "url": "$2"
     }
 ]