player: disable dumping configutation in LGPL mode

This was added in 0810e4275. The patch author did not reply (yet). Not
sure if copyrightable, but I'm making the still existing C part GPL-only
for now (in a previous commit).

player/main.c

@@ -147,7 +147,10 @@ void mp_print_version(struct mp_log *log, int always)
     mp_msg(log, v, "\n");
     // Only in verbose mode.
     if (!always) {
+#if HAVE_GPL
+        // Possibly GPL due to 0810e42750fb2e2e0d602388cef1b8ea8015d935.
         mp_msg(log, MSGL_V, "Configuration: " CONFIGURATION "\n");
+#endif
         mp_msg(log, MSGL_V, "List of enabled features: %s\n", FULLCONFIG);
     }
 }