windows ffmpeg binaries depends on msys2 installed openssl rather than project built openssl

For example,      

```bash
$ ldd build/bin/ffmpeg
...
	libcrypto-1_1-x64.dll => /d/a/ffmpeg-build/ffmpeg-build/build/bin/libcrypto-1_1-x64.dll (0x7ffcc0500000)
	libssl-1_1-x64.dll => /d/a/ffmpeg-build/ffmpeg-build/build/bin/libssl-1_1-x64.dll (0x7ffcc0470000)
...
```

But project built openssl should be `3.0` static library. These two `1_1` copied from `/ming64/bin`.     


