Log message:
svt-av1: Add missing patches from previous.

Log message:
svt-av1: Fix build on SunOS.

Log message:
svt-av1: update to 1.5.0.

## [1.5.0] - 2023-04-25

Encoder
- Optimize the tradeoffs for M0-M13 speeding up M5-M1 by 15-30% and improving \ 
the BDR of M6-M13 by 1-3%
- Create a new preset MR (--preset -1) to be the quality reference
- Optimize the tradeoffs for M8-M13 in the low delay encoding mode (!2052 !2096 \ 
and !2102) for SC and non-SC modes
- Add dynamic minigop support for the random access configuration enabled by \ 
default in M9 and below
- Add support to allow users to specify lambda scaling factors through the \ 
commandline
- Rewrite the gstreamer plugin and updating it to be uptodate with the latest \ 
API changes
- Add skip frames feature allowing the user to start encoding after n frames in \ 
the file
- Add ability to specify a smaller startup minigop size for every gop to enable \ 
faster prefetching
- Fix segmentation support and re-enable it with --aq-mode 1 to allow work on \ 
the region of interest API
- Add padding bytes to the EbSvtAv1EncConfiguration configuration structure keep \ 
its size unchanged until v2.0

Build, Cleanup and Documentation
- Major cleanups for unused variables, static functions, and comments formatting
- Reduce the size of variables
- Refine app level parsing and reference scaling API calls in the application
- Add dynamic minigop documentation along with updating the documentation accordingly

Log message:
svt-av1: add missing nasm tool dependency

Log message:
add SVT-AV1 1.4.1

The Scalable Video Technology for AV1 (SVT-AV1 Encoder and Decoder) is an
AV1-compliant software encoder/decoder library. The work on the SVT-AV1
encoder targets the development of a production-quality AV1-encoder with
performance levels applicable to a wide range of applications, from premium
VOD to real-time and live encoding/transcoding. The SVT-AV1 decoder
implementation targets future codec research activities.

The SVT-AV1 project was initially founded by Intel in partnership with
Netflix, and was then adopted by the Alliance of Open Media (AOM)
Software Implementation Working Group (SIWG), in August 2020, to
carry on the group's mission.