Compatibility changes for wpa_supplicant and OpenSSH.

OpenSSH, especially, does some terrible things that mean that it needs
the EVP_CIPHER structure to be exposed ☹. Damian is open to a better API
to replace this, but only if OpenSSL agree too. Either way, it won't be
happening soon.

Change-Id: I393b7a6af6694d4d2fe9ebcccd40286eff4029bd
Reviewed-on: https://boringssl-review.googlesource.com/4330
Reviewed-by: Adam Langley <agl@google.com>

include/openssl/ssl.h

diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index e6545da..138f525 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -159,6 +159,9 @@
 /* Some code expected to get the threading functions by including ssl.h. */
 #include <openssl/thread.h>
 
+/* wpa_supplicant expects to get the version functions from ssl.h */
+#include <openssl/crypto.h>
+
 #if defined(__cplusplus)
 extern "C" {
 #endif