Move OPENSSL_CONF from e_os.h to cryptlib.h

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4188)

ssl/statem/statem.c

diff --git a/ssl/statem/statem.c b/ssl/statem/statem.c
index d171ece..0f34522 100644
--- a/ssl/statem/statem.c
+++ b/ssl/statem/statem.c
@@ -7,7 +7,7 @@
  * https://www.openssl.org/source/license.html
  */
 
-#include "e_os.h"
+#include "internal/cryptlib.h"
 #include <openssl/rand.h>
 #include "../ssl_locl.h"
 #include "statem_locl.h"