pypa: enable optimizations

This converts a lot of -(int) into (-int)

src/codegen/parser.cpp

@@ -1074,9 +1074,9 @@ AST_Module* parse_file(const char* fn, FutureFlags inherited_flags) {
 
 const char* getMagic() {
     if (ENABLE_PYPA_PARSER)
-        return "a\ncN";
+        return "a\ncO";
     else
-        return "a\ncn";
+        return "a\nco";
 }
 
 #define MAGIC_STRING_LENGTH 4

src/codegen/pypa-parser.cpp

@@ -1169,6 +1169,7 @@ static AST_Module* parse_with_reader(std::unique_ptr<pypa::Reader> reader, Futur
     pypa::AstModulePtr module;
     pypa::ParserOptions options;
 
+    options.perform_inline_optimizations = true;
     options.printerrors = false;
     options.python3allowed = false;
     options.python3only = false;