Update Vcpkg for VS2017 workers to fix annoying warning.

[XVilka]

Currently it spills this with Meson + MSBuild:

  Performing Custom Build Tools
  Vcpkg is unable to link because we cannot decide between Release and Debug libraries. Please define the property VcpkgConfiguration to be 'Release' or 'Debug' (currently 'release').

https://ci.appveyor.com/project/radareorg/radare2/builds/35867517/job/275idj44r4maytb1?fullLog=true#L547

See microsoft/vcpkg#3763 and microsoft/vcpkg#2790

There are many releases available since the fix landed in vcpkg: https://github.com/microsoft/vcpkg/releases
Probably one of them should fix the problem.

In fact, for some reason it also happens in VS2019 worker: https://ci.appveyor.com/project/radareorg/radare2/builds/35867517/job/xbmfrxmc80vr70fm?fullLog=true#L349

[FeodorFitsner]

Have you tried building on Visual Studio 2019 image? It has the most recent vcpkg installed.

[XVilka]

@FeodorFitsner yes, it happens on that image as well: https://ci.appveyor.com/project/radareorg/radare2/builds/35867517/job/xbmfrxmc80vr70fm?fullLog=true#L349

    # VS2019 64
    - builder: vs2019_64
      PYTHON: 'C:\\Python38-x64'
      INNO_SETUP: 'C:\\Program Files (x86)\\Inno Setup 6'
      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
      BUILD_DIR: build
      RUN_TESTS: true

https://github.com/radareorg/radare2/blob/master/.appveyor.yml#L26

[FeodorFitsner]

vcpkg has been updated on VS 2019 image. Let me know if your build works there.

[XVilka]

@FeodorFitsner curiously it didn't solve the problem of the warning but also made builds slower: radareorg/radare2#17859 (compare build 8019 with build 8020)