Vcpkg: error with downloading brotli[core]:x86-windows

[RelativeScale12]

Disclaimer: English is not my first language, so I'm sorry for any mistakes

Description
While downloading any package depending on brotli vcpkg gives the following error:

`"Couldn't connect to server"                                                                                            
CMake Error at scripts/cmake/vcpkg_download_distfile.cmake:181 (message):                                                                                                                                                                             

Failed to download file. If you use a proxy, please set the HTTPS_PROXY and HTTP_PROXY environment variables to "https://user:password@your-proxy-ip-address:port/". Otherwise, please submit an issue at https://github.com/Microsoft/vcpkg/issues
Call Stack (most recent call first): 
scripts/cmake/vcpkg_find_acquire_program.cmake:438 (vcpkg_download_distfile) 
scripts/cmake/vcpkg_fixup_pkgconfig.cmake:270 (vcpkg_find_acquire_program) 
ports/brotli/portfile.cmake:25 (vcpkg_fixup_pkgconfig)
scripts/ports.cmake:79 (include)

Error: Building package brotli:x86-windows failed with: BUILD_FAILED

Please ensure you're using the latest portfiles with `.\vcpkg update`, then 
submit an issue at https://github.com/Microsoft/vcpkg/issues including: 
Package: brotli:x86-windows
Vcpkg version: 2020.06.15-nohash
Additionally, attach any relevant sections from the log files above.
`  

Environment

• OS: Windows 10 1909

To Reproduce
Steps to reproduce the behavior:
./vcpkg install brotli [or any package depending on it, in my case it was qt5]

[traversaro]

A quick workaround is to download the files:

• https://mirror.yandex.ru/mirrors/msys2/mingw/i686/mingw-w64-i686-pkg-config-0.29.2-1-any.pkg.tar.xz
• https://mirror.yandex.ru/mirrors/msys2/mingw/i686/mingw-w64-i686-libwinpthread-git-8.0.0.5906.c9a21571-1-any.pkg.tar.zst

In the downloads subdirectory of the main vcpkg directory.

[JackBoosY]

Duplicate to #13852.