Rename ssl_debug_helpers.h

It's no longer generated, so rename it accordingly.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index faace4a..5e74083 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -26,7 +26,7 @@
 #include "mbedtls/debug.h"
 
 #include "ssl_misc.h"
-#include "ssl_debug_helpers_generated.h"
+#include "ssl_debug_helpers.h"
 
 int mbedtls_ssl_tls13_handshake_server_step( mbedtls_ssl_context *ssl )
 {