Log Message:
Update multimedia/intel-vaapi-driver to 1.8.0

pkgsrc changes:
 - Delete patches/patch-src_i965__decoder__utils.c: applied upstream

Changes:
Version 1.8.0 - 31.Mar.2017
* Improve the quality of the H.264 encoder on SKL+ for CQP and CBR mode
* Improve the quality of the VP8 encoder on BSW+ for CQP and CBR mode
* Add support for H.264 VBR mode on SKL+
* Add support for VP8 VBR mode on BSW+
* Add support for low-power H.264 encoder on BXT and KBL
* Add support for CBR / VBR with low-power H.264 encoder on SKL+ (A HuC Firmware and
  a HuC supported Linux kernel are required)
* Add support for CSC and scaling with 10bit P010/I010 surface
* Optimize CSC and scaling with 8bit NV12 and I420 surface
* Fix the wrong memory object cache setting on SKL+
* Fix the EU number in media pipeline
* Fix the wrong bit shift in H.264 encoder
* Fix the 48bit graphics address on BSW+
* Fix building on NetBSD
* Known issues
  - The new AVC encoder doesn't support MVC/SVC encoding
  - The new AVC encoder doesn't support ROI encoding
  - The new AVC encoder doesn't support multiple slice encoding