Update duckdb index files

.gitattributes

@@ -100,3 +100,4 @@ iwslt2017-ja-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-it/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-ro/test/index.duckdb filter=lfs diff=lfs merge=lfs -text
 iwslt2017-nl-en/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text
+iwslt2017-nl-ro/validation/index.duckdb filter=lfs diff=lfs merge=lfs -text

iwslt2017-nl-ro/validation/index.duckdb

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ba32432c1193e8ab5b920de6bedb12a17adb2c4cfeda7e566ed98d457e5b8bf6
+size 1060864