Update BUILD

Making buildifier happy to save a review loop.

Author: aiuto

tests/tar/BUILD

@@ -469,10 +469,6 @@ py_test(
         ":test-tar-compression_level-3",
         ":test-tar-compression_level-6",
         ":test-tar-compression_level-9",
-        ":test-tar-xz-compression_level--1",
-        ":test-tar-xz-compression_level-3",
-        ":test-tar-xz-compression_level-6",
-        ":test-tar-xz-compression_level-9",
         ":test-tar-empty_dirs.tar",
         ":test-tar-empty_files.tar",
         ":test-tar-files_dict.tar",
@@ -490,6 +486,10 @@ py_test(
         ":test-tar-strip_prefix-substring.tar",
         ":test-tar-tree-artifact",
         ":test-tar-tree-artifact-noroot",
+        ":test-tar-xz-compression_level--1",
+        ":test-tar-xz-compression_level-3",
+        ":test-tar-xz-compression_level-6",
+        ":test-tar-xz-compression_level-9",
         ":test-tree-input-with-strip-prefix",
         ":test_tar_leading_dotslash",
         ":test_tar_package_dir_substitution.tar",