Function equivalent

ext/include/llvm/Support/FileSystem.h:511–514

Simpler version of equivalent for clients that don't need to differentiate between an error and false.

/// Simpler version of equivalent for clients that don't need to
///        differentiate between an error and false.
inline bool equivalent(const Twine &A, const Twine &B) {
  bool result;
  return !equivalent(A, B, result) && result;
}

/// Is the file mounted on a local filesystem?
///