build: declare savedmodel loader dep

Author: Apricityx

scripts/patch_tfjava.py

@@ -930,6 +930,7 @@ def patch_workspace(path: Path) -> None:
 +            ":tf_status",
 +            ":tf_tensor",
 +            "@com_google_absl//absl/strings",
++            "//tensorflow/cc/saved_model:loader",
 +            "//tensorflow/cc/saved_model:loader_lite",
 +            "//tensorflow/cc:gradients",
 +            "//tensorflow/cc:ops",