Refresh autoconf-archive m4 scripts

fficonfig.h.in

@@ -160,6 +160,9 @@
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 
+/* Define if symbols are underscored. */
+#undef SYMBOL_UNDERSCORE
+
 /* Define this if you are using Purify and want to suppress spurious messages.
    */
 #undef USING_PURIFY
@@ -179,6 +182,9 @@
 # endif
 #endif
 
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
+
 
 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
 #ifdef LIBFFI_ASM