Updated status code: set -10 for autotune failure

docs/status_codes.txt

@@ -1,6 +1,7 @@
 status codes on exit:
 =====================
 
+-10 = autotune failure
  -8 = mixed backend errors (combo of -3, -4, -5, -6, -7 errors type)
  -7 = backend error: Invalid module_extra_buffer_size
  -6 = backend error: Too many compute units to keep minimum kernel accel limit

src/hashcat.c

@@ -266,7 +266,7 @@ static int inner2_loop (hashcat_ctx_t *hashcat_ctx)
         event_log_warning (hashcat_ctx, "You can use --force to override this, but do not report related errors.");
         event_log_warning (hashcat_ctx, NULL);
 
-        return -1;
+        return -10;
       }
     }
   }