Include fixups (headers moves to private directory)

Signed-off-by: Anton Matkin <anton.matkin@arm.com>
diff --git a/programs/ssl/dtls_client.c b/programs/ssl/dtls_client.c
index 26eb20d..bb1d5af 100644
--- a/programs/ssl/dtls_client.c
+++ b/programs/ssl/dtls_client.c
@@ -31,8 +31,8 @@
 #include "mbedtls/net_sockets.h"
 #include "mbedtls/debug.h"
 #include "mbedtls/ssl.h"
-#include "mbedtls/entropy.h"
-#include "mbedtls/ctr_drbg.h"
+#include "mbedtls/private/entropy.h"
+#include "mbedtls/private/ctr_drbg.h"
 #include "mbedtls/error.h"
 #include "mbedtls/timing.h"
 #include "test/certs.h"