Fix build issues for implicit declaration for `esp_fill_random`
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
-#include <esp_system.h>
+#include <esp_random.h>
/* ToDo - Remove this once appropriate solution is available.
We need to define this for the file as ssl_misc.h uses private structures from mbedtls,
