Validation of C++ binaries

Appveyor is down, but tested this locally, for builds with `--toolset=v140` this should pass. This should fail in the following scenarios:

  - vendorized node.exe is accidentally not from node-cpp11
  - any native modules get built incorrectly (built with either /MT or built against a runtime that is not Visual Studio 2014)

The validation focus of this script is windows, but could be extended further for linux and osx in the future.