fix sdk override script for linux platform (kubernetes-sigs#2280)

Author: kishorj

scripts/aws_sdk_model_override/setup.sh

@@ -11,12 +11,12 @@ rm -rf "${SDK_VENDOR_PATH}"
 git clone --depth 1 https://github.com/aws/aws-sdk-go.git "${SDK_VENDOR_PATH}"
 
 # Override the SDK models
-cp -r "${SDK_MODEL_OVERRIDE_SRC_PATH}/" "${SDK_MODEL_OVERRIDE_DST_PATH}/"
+cp -r "${SDK_MODEL_OVERRIDE_SRC_PATH}"/* "${SDK_MODEL_OVERRIDE_DST_PATH}"/.
 
 # Generate the SDK
 pushd "${SDK_VENDOR_PATH}"
 make generate
 popd
 
 # Use the vendored version of aws-sdk-go
-go mod edit -replace github.com/aws/aws-sdk-go="${SDK_VENDOR_PATH}"
+go mod edit -replace github.com/aws/aws-sdk-go="${SDK_VENDOR_PATH}"