Update libva-utils to version 2.15.0 / rev 19 via SR 987904
    
    https://build.opensuse.org/request/show/987904
    by user sndirsch + dimstar_suse
    - update to 2.15.0
      * add: Added HDR10 Tone Mapping sample code including H2H and H2S config files.
      *  add: Support lowpower for HEVC Encoding
      *  fix: Set correct entrypoint for lowpower
      *  fix: Components exceed the value specified by jpeg spec
      *  fix: hdr local variable pointer access issue
      *  fix: Fix issue incorrect color for EU based hevcencode
      *  fix: exclude vgem node and invalid drm node in vainfo
      *  ci:Disable travis build
      *  meson: check the dependency of libdrm