player: remove additional newline before exit message

What was this even for? Also, most times, the cleared status line will
show up as an empty new line anyway, so this commit reduces the empty
new lines from 2 to 1.

player/main.c

@@ -452,7 +452,7 @@ int mpv_main(int argc, char *argv[])
     }
 
     if (reason)
-        MP_INFO(mpctx, "\nExiting... (%s)\n", reason);
+        MP_INFO(mpctx, "Exiting... (%s)\n", reason);
     if (mpctx->has_quit_custom_rc)
         rc = mpctx->quit_custom_rc;