I suggest you to use BSP for Intel Quark v1.0.1. Once you are using v1.0.1 I suggest you to use the patches (there is one for OpenCV), the instruction can be found in here. There is also a script for applying patches to BSP, you can download the script from here. Another option is to modify the OpenCV recipe and to update the link or to point to the file you downloaded. I would highly suggest you to download BSP 1.0.1 and to apply the patches.