update appvoyer

Author: smasherprog

.appveyor.yml

@@ -38,6 +38,7 @@ install:
   - git clone https://github.com/Microsoft/vcpkg
   - cd vcpkg
   - powershell -exec bypass scripts\bootstrap.ps1
+  - echo %cd%\vcpkg\scripts\buildsystems\vcpkg.cmake
   - .\vcpkg integrate install
   - .\vcpkg install zlib:%PLATFORM%-windows%POSTVCPKGNAME% openssl:%PLATFORM%-windows%POSTVCPKGNAME%
   - cd ..