message: Only VS kits on AppVeyor (for now)
diff: @@ -114,9 +114,9 @@ const KITS_BY_PLATFORM: {[osName: string]: KitEnvironment[]} = {
  expectedDefaultGenerator: /^Unix Makefiles/,
  path: [' C:\\Program Files\\LLVM\\bin']
  }]),
  - ['Visual Studio 2017']: DEFAULT_WINDOWS_KITS,
  - ['Visual Studio 2017 Preview']: DEFAULT_WINDOWS_KITS,
  - ['Visual Studio 2015']: DEFAULT_WINDOWS_KITS,
  + ['Visual Studio 2017']: DEFAULT_VS_KITS,
  + ['Visual Studio 2017 Preview']: DEFAULT_VS_KITS,
  + ['Visual Studio 2015']: DEFAULT_VS_KITS,
  ['linux']: [
  {defaultKit: /Clang/, expectedDefaultGenerator: /Unix Makefiles/},
  {defaultKit: /GCC/, expectedDefaultGenerator: /Unix Makefiles/}
  