Use awk matching for ino.

This test regularly fails here because the grep is greedy and can
match inodes ending in the same digits as the one we're looking for.
Make it use the same awk pattern used below.

Signed-off-by: Auke Kok <auke.kok@versity.com>

tests/tests/simple-inode-index.sh

@@ -32,7 +32,7 @@ echo "== dirs shouldn't appear in data_seq queries"
 mkdir "$DIR"
 ino=$(stat -c "%i" "$DIR")
 t_sync_seq_index
-query_index data_seq | grep "$ino\>"
+query_index data_seq | awk '($4 == "'$ino'")'
 
 echo "== two created files are present and come after each other"
 touch "$DIR/first"