Update libmfx to rev 7 via SR 830070
    
    https://build.opensuse.org/request/show/830070
    by user sndirsch + dimstar_suse
    - Update to version 20.2.1
      * Samples: Fixed #2190. rotate_opencl plugin switched to recent
        version of OpenCL C++ headers, validated with OpenCL-CLHPP
        v2.0.12 and OpenCL-Headers v2020.06.16 / Intel® SDK for OpenCL™
        Applications for Windows* 2020.2.487.
    
    - Update to version 20.2.0
      * bugfixes and improvements
      * includes: Build system does not enforce specific instruction
        set (issue#2047, boo#1167346)
    - supersedes u_buildfix-for-gcc10.patch
    
    - Move samples into a new subpackage
    - The library does not depend on the tools, drop Requires
    - Apply patch unconditionally, use %autosetup
    - Move LICENSE to library package
    - Make the sover part of %files
    - Don't bother building tests, they're not run anyway