testsuite: fixes after randomconfig run

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/testsuite/tar/tar-extracts-all-subdirs b/testsuite/tar/tar-extracts-all-subdirs
index 886c37c..f5351f4 100644
--- a/testsuite/tar/tar-extracts-all-subdirs
+++ b/testsuite/tar/tar-extracts-all-subdirs
@@ -9,4 +9,4 @@
 rm -rf foo/*
 tar xf foo.tar -C foo ./1/10
 find foo | sort >logfile.gnu
-cmp logfile.gnu logfile.bb
+diff -u logfile.gnu logfile.bb