Allow creating logger instances on the Wine side

So we can log filterable messages from the Wine side. Will be used to
warn about failed query interface calls.

src/common/logging/common.h

@@ -85,6 +85,13 @@ class Logger {
      */
     static Logger create_from_environment(std::string prefix = "");
 
+    /**
+     * Create a special logger instance that outputs directly to STDERR without
+     * any prefixes. This is used to be able to log filterable messages from the
+     * Wine side of things.
+     */
+    static Logger create_wine_stderr();
+
     /**
      * Write a message to the log, prefixing it with a timestamp and this
      * logger's prefix string.