Rename stdnoreturn.h to helpers.h

This file will contain more compiler-specific helpers.

Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>

include/asm/main.h

@@ -12,7 +12,7 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-#include "extern/stdnoreturn.h"
+#include "helpers.h"
 
 struct sOptions {
 	char binary[2];

include/extern/err.h

@@ -17,7 +17,7 @@
 
 #include <stdarg.h>
 
-#include "extern/stdnoreturn.h"
+#include "helpers.h"
 
 #define warn rgbds_warn
 #define vwarn rgbds_vwarn

include/helpers.h

@@ -6,8 +6,8 @@
  * SPDX-License-Identifier: MIT
  */
 
-#ifndef EXTERN_STDNORETURN_H
-#define EXTERN_STDNORETURN_H
+#ifndef HELPERS_H
+#define HELPERS_H
 
 #if defined(__STDC_VERSION__)
 	#if __STDC_VERSION__ >= 201112L
@@ -35,4 +35,4 @@
 	#define noreturn
 #endif
 
-#endif /* EXTERN_STDNORETURN_H */
+#endif /* HELPERS_H */

include/link/script.h

@@ -11,7 +11,7 @@
 
 #include <stdint.h>
 
-#include "extern/stdnoreturn.h"
+#include "helpers.h"
 
 noreturn void script_fatalerror(const char *fmt, ...);