compilation error when stdnoreturn.h is included

[bernhardbreuss]

Hi,

when stdnoreturn.h is included before unity.h a compiler error for a unknown attribute is generated:

In file included from ../../src/unity.h:21,
                 from ../tests/test_unity_strings.c:7:
../../src/unity_internals.h:621:1: error: '_Noreturn' attribute directive ignored [-Werror=attributes]
  621 | void UnityFail(const char* message, const UNITY_LINE_TYPE line) UNITY_FUNCTION_ATTR(noreturn);
      | ^~~~
../../src/unity_internals.h:622:1: error: '_Noreturn' attribute directive ignored [-Werror=attributes]
  622 | void UnityIgnore(const char* message, const UNITY_LINE_TYPE line) UNITY_FUNCTION_ATTR(noreturn);
      | ^~~~

This seems to occur because in stdnoreturn.h noreturn is defined to the keyword _Noreturn.