message: Reduce the verbosity of MSBuild in AppVeyor
diff: @@ -14,7 +14,7 @@ build_script:
  - mkdir build
  - cd build
  - cmake -DNXT_USE_WERROR=1 -DNXT_ENABLE_VULKAN=1 ..
  - - cmake --build .
  + - cmake --build . -- /verbosity:minimal
  # TODO(cwallez@chromium.org) test on more than Debug.
  - Debug\nxt_unittests.exe
  