Align the SSL stack on #include style.

ssl.h should be first. Also two lines after includes and the rest of the
file.

Change-Id: Icb7586e00a3e64170082c96cf3f8bfbb2b7e1611
Reviewed-on: https://boringssl-review.googlesource.com/5892
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index 6e82fff..f2539ee 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -148,6 +148,8 @@
  * OTHERWISE.
  */
 
+#include <openssl/ssl.h>
+
 #include <assert.h>
 #include <stdio.h>
 #include <string.h>