Add tester scripts

Adds tester scripts to verify patching was completed successfully.

tools/patch-tester/patch-tester.sh

+#!/usr/bin/env bash
+
+ffmpeg -y -vsync 0 -hwaccel cuda -hwaccel_output_format cuda -f lavfi -i testsrc -t 50 -vf hwupload -c:a copy -c:v h264_nvenc -b:v 4M -f null - -vf hwupload -c:a copy -c:v h264_nvenc -b:v 1M -f null - -vf hwupload -c:a copy -c:v h264_nvenc -b:v 8M -f null - -vf hwupload -c:a copy -c:v h264_nvenc -b:v 6M -f null - -vf hwupload -c:a copy -c:v h264_nvenc -b:v 5M -f null - -vf hwupload -c:a copy -c:v h264_nvenc -b:v 7M -f null -

win/tools/patch-tester/patch-tester.bat

+@echo off
+
+ffmpeg.exe -y -hwaccel cuda -hwaccel_output_format cuda -f lavfi -i testsrc -t 50 -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 4M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 1M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 8M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 6M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 5M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 7M -f null -

win/tools/patch-tester/patch-tester.ps1

+#!/usr/bin/env pwsh
+
+ffmpeg.exe -y -hwaccel cuda -hwaccel_output_format cuda -f lavfi -i testsrc -t 50 -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 4M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 1M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 8M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 6M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 5M -f null - -vf hwupload -fps_mode passthrough -c:a copy -c:v h264_nvenc -b:v 7M -f null -