message: [platform-expression] fix PlatformExpression::compare()
diff: @@ -676,7 +676,7 @@ namespace vcpkg::PlatformExpression
  int compare(const Expr& lhs, const Expr& rhs)
  {
  auto lhs_platform_complexity = lhs.complexity();
  - auto rhs_platform_complexity = lhs.complexity();
  + auto rhs_platform_complexity = rhs.complexity();
  if (lhs_platform_complexity < rhs_platform_complexity) return -1;
  if (rhs_platform_complexity < lhs_platform_complexity) return 1;
  