message: [vcpkg] Further fix for clang/gcc
diff: cmake_minimum_required(VERSION 3.3)
  project(vcpkg CXX)
  +add_compile_options(-std=c++1z)
  +
  +if(CMAKE_COMPILER_IS_GNUXX)
  + set(GCC 1)
  +elseif(CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang")
  + set(CLANG 1)
  +endif()
  +
  file(GLOB_RECURSE VCPKGLIB_SOURCES src/vcpkg/*.cpp)
  add_library(vcpkglib STATIC ${VCPKGLIB_SOURCES})
  target_compile_definitions(vcpkglib PRIVATE -DDISABLE_METRICS=0)
  target_include_directories(vcpkglib PUBLIC include)
  -if(CMAKE_COMPILER_IS_GNUXX)
  - target_link_libraries(vcpkglib PRIVATE stdc++fs)
  - target_compile_options(vcpkglib PRIVATE -std=c++1z)
  -elseif(CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang")
  - target_link_libraries(vcpkglib PRIVATE c++experimental)
  - target_compile_options(vcpkglib PRIVATE -std=c++1z)
  +if(GCC)
  + target_link_libraries(vcpkglib PUBLIC stdc++fs)
  +elseif(CLANG)
  + target_link_libraries(vcpkglib PUBLIC c++experimental)
  endif()
  add_executable(vcpkg src/vcpkg.cpp)
  