Move TLS 1.3 client hello writing to new TLS 1.2 and 1.3 client file

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/Makefile b/library/Makefile
index d49d20c..d267e05 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -168,6 +168,7 @@
 	  net_sockets.o \
 	  ssl_cache.o \
 	  ssl_ciphersuites.o \
+	  ssl_client.o \
 	  ssl_cookie.o \
 	  ssl_msg.o \
 	  ssl_ticket.o \