errno.h must be included after config.h because config.h might define

_REENTRANT, _THREAD_SAFE, etc., which affect how errno is defined
on some architectures

* ext/openssl/ossl.h: include errno.h after ruby.h

* include/ruby/io.h: include errno.h after ruby/config.h

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65906 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/openssl/ossl.h

@@ -13,8 +13,8 @@
 #include RUBY_EXTCONF_H
 
 #include <assert.h>
-#include <errno.h>
 #include <ruby.h>
+#include <errno.h>
 #include <ruby/io.h>
 #include <ruby/thread.h>
 #include <openssl/opensslv.h>

include/ruby/io.h

@@ -24,7 +24,6 @@ extern "C" {
 #endif
 
 #include <stdio.h>
-#include <errno.h>
 #include "ruby/encoding.h"
 
 #if defined(HAVE_STDIO_EXT_H)
@@ -32,6 +31,7 @@ extern "C" {
 #endif
 
 #include "ruby/config.h"
+#include <errno.h>
 #if defined(HAVE_POLL)
 #  ifdef _AIX
 #    define reqevents events