This puts pg_config.h.in content back into the "correct" order.
/* Define to 1 if you have the <editline/readline.h> header file. */
#undef HAVE_EDITLINE_READLINE_H
-/* Define to 1 if you have the `explicit_bzero' function. */
-#undef HAVE_EXPLICIT_BZERO
-
/* Define to 1 if you have the <execinfo.h> header file. */
#undef HAVE_EXECINFO_H
+/* Define to 1 if you have the `explicit_bzero' function. */
+#undef HAVE_EXPLICIT_BZERO
+
/* Define to 1 if you have the `fdatasync' function. */
#undef HAVE_FDATASYNC