Include sys by default, for argv filling

trans/transpiler/phases/emit_cpp/file.py

@@ -11,6 +11,7 @@ class FileVisitor(BlockVisitor):
     def visit_Module(self, node: ast.Module) -> Iterable[str]:
         stmt: ast.AST
         yield "#include <python/builtins.hpp>"
+        yield "#include <python/sys.hpp>"
         visitor = ModuleVisitor(self.scope)
         code = [line for stmt in node.body for line in visitor.visit(stmt)]
         yield from visitor.includes