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/scripts/generate_ssl_debug_helpers.py b/scripts/generate_ssl_debug_helpers.py
index 37e9786..21122b5 100755
--- a/scripts/generate_ssl_debug_helpers.py
+++ b/scripts/generate_ssl_debug_helpers.py
@@ -242,7 +242,7 @@
 
 #if defined(MBEDTLS_DEBUG_C)
 
-#include "ssl_debug_helpers_generated.h"
+#include "ssl_debug_helpers.h"
 
 {functions}