* Added aws_crt_error_str and test, removed awscrt_version test function
* Added aws_crt_error_name
* Added aws_crt_error_debug_str
* Use PHP's own tools to generate arginfo
* Only re-generate arginfo on php7+
* Added a definition for ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX for php5
* Ignore generated files for clang-format