fs: add indirection to raw storage open, for hac2l

libraries/libstratosphere/source/fssystem/fssystem_crypto_configuration.cpp

@@ -180,6 +180,11 @@ namespace ams::fssystem {
         cfg->decrypt_aes_ctr_external      = DecryptAesCtrForPreparedKey;
         cfg->is_plaintext_header_available = !prod;
 
+        /* TODO: Should this default to false for host tools with api to set explicitly? */
+        #if !defined(ATMOSPHERE_BOARD_NINTENDO_NX)
+        cfg->is_unsigned_header_available_for_host_tool = true;
+        #endif
+
         return cfg;
     }