FFmpeg failed to run fate-hls-segment-size test on release|x86 and debug|x86 configuration with VS2017 on windows

[KarenHuang]

Summary of the bug:
FFmpeg failed to run fate-hls-segment-size test on release|x86 and debug|x86 configuration with VS2017 on Windows. This issue can be first reproduced from master revision 2a50f1d. Could you please help take a look at this? Thank you!

Steps to reproduce:

1.git clone ​​https://github.com/FFmpeg/FFmpeg.git D:\FFmpeg\src
2.Open a VS 2017 x86 prompt and browse to D:\FFmpeg
3.set FFMPEG_TARGET=i386
4.set FFMPEG_SRC_PATH=D:\FFmpeg/src
5.set FFMPEG_FATE_PATH=../fate-suite/
6.set PATH=D:\FFmpeg\tools;%PATH%
7.set MSYS2_PATH_TYPE=inherit
8..\tools\msys32\usr\bin\sh.exe --login -i -c "/D/ffmpeg/tools/build.sh"
9..\tools\msys32\usr\bin\sh.exe --login -i -c "/D/ffmpeg/tools/test.sh"

Actual result:
reference file './tests/ref/fate/hls-segment-size' not found
./tests/fate-run.sh: line 523: tests/data/fate/hls-segment-size.diff: No such file or directory
Test hls-segment-size failed. Look at tests/data/fate/hls-segment-size.err for details.
make: * [tests/Makefile:236: fate-hls-segment-size] Error 1
make: * Waiting for unfinished jobs....
TEST filter-allyuv
Failed FATE test suite!
[command took 67 seconds]

[KarenHuang]

log_x86_test

[mkver]

This was not plattform-specific: It has been forgotten to add a certain file that was needed for fate. But it has been fixed now.