message: added arg info for swoole_serialize
diff: #include "swoole_serialize.h"
  #if PHP_MAJOR_VERSION >= 7
  +#define CPINLINE sw_inline
  +ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_serialize_pack, 0, 0, 1)
  + ZEND_ARG_INFO(0, data)
  + ZEND_ARG_INFO(0, flag)
  +ZEND_END_ARG_INFO()
  +
  +ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_serialize_unpack, 0, 0, 1)
  + ZEND_ARG_INFO(0, string)
  + ZEND_ARG_INFO(0, args)
  +ZEND_END_ARG_INFO()
  -#define CPINLINE sw_inline
  static void swoole_serialize_object(seriaString *buffer, zval *zvalue, size_t start);
  static void swoole_serialize_arr(seriaString *buffer, zend_array *zvalue);
  static void* swoole_unserialize_arr(void *buffer, zval *zvalue, uint32_t num);
  static void* swoole_unserialize_object(void *buffer, zval *return_value, zend_uchar bucket_len, zval *args);
  -
  static PHP_METHOD(swoole_serialize, pack);
  static PHP_METHOD(swoole_serialize, unpack);
  static const zend_function_entry swoole_serialize_methods[] = {
  - PHP_ME(swoole_serialize, pack, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
  - PHP_ME(swoole_serialize, unpack, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
  + PHP_ME(swoole_serialize, pack, arginfo_swoole_serialize_pack, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
  + PHP_ME(swoole_serialize, unpack, arginfo_swoole_serialize_unpack, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
  PHP_FE_END
  };
  