message: ci: fix call -> cmd /c on appveyor
diff: @@ -53,9 +53,6 @@ install:
  # - ps: $env:path="C:\Program Files (x86)\nasm;$($env:path)"
  - ps: Update-NodeJsInstallation (Get-NodeJsLatestBuild $env:nodejs_version) $env:Platform
  - # Update npm for versions < 1
  - - IF %nodejs_version% LSS 1 npm -g install npm
  - - IF %nodejs_version% LSS 1 set PATH=%APPDATA%\npm;%PATH%
  - SET PATH=%cd%\node_modules\.bin\;%PATH%
  # Output useful info for debugging.
  - node --version
  @@ -108,9 +105,9 @@ build_script:
  - cmd: |
  echo %PLATFORM%
  IF "%PLATFORM%" == "x64" (
  - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
  + cmd /c "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
  ) ELSE (
  - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars32.bat"
  + cmd /c "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars32.bat"
  )
  dumpbin /dependents ./lib/binding/node_libcurl.node
  