Also moved fallback definition of __has_attribute

include/ruby/intern.h

@@ -21,6 +21,10 @@ extern "C" {
 #endif
 #endif
 
+#if !defined(__has_attribute)
+#define __has_attribute(x) 0
+#endif
+
 #include "ruby/defines.h"
 #ifdef RUBY_EXTCONF_H
 #include RUBY_EXTCONF_H

include/ruby/ruby.h

@@ -2353,10 +2353,6 @@ ERRORFUNC(("variable argument length doesn't match"), void rb_scan_args_length_m
 
 # define rb_scan_args_isdigit(c) ((unsigned char)((c)-'0')<10)
 
-#if !defined(__has_attribute)
-#define __has_attribute(x) 0
-#endif
-
 #  define rb_scan_args_count_end(fmt, ofs, vari) \
      (fmt[ofs] ? -1 : (vari))