ssl: upgarde to uint32 for bytes_processed

as it can overflow, and is compared with uint32 such as
message_length and message_start and

(cherry picked from commit 48f0c612e3)

src/app-layer-ssl.h

@@ -186,7 +186,7 @@ typedef struct SSLStateConnp_ {
     uint32_t handshake_length;
 
     /* the no of bytes processed in the currently parsed record */
-    uint16_t bytes_processed;
+    uint32_t bytes_processed;
     /* the no of bytes processed in the currently parsed handshake */
     uint16_t hs_bytes_processed;