Process signature algorithms in ClientHello late.

Reviewed-by: Tim Hudson <tjh@openssl.org>
diff --git a/ssl/ssl.h b/ssl/ssl.h
index f45264c..343247c 100644
--- a/ssl/ssl.h
+++ b/ssl/ssl.h
@@ -2682,6 +2682,7 @@
 #define SSL_F_SSL_CERT_INSTANTIATE			 214
 #define SSL_F_SSL_CERT_NEW				 162
 #define SSL_F_SSL_CERT_SET0_CHAIN			 340
+#define SSL_F_SSL_CHECK_CLIENTHELLO_TLSEXT_LATE		 335
 #define SSL_F_SSL_CHECK_PRIVATE_KEY			 163
 #define SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT		 280
 #define SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG		 279