ls: fix --color handling. Closes bug 435.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/testsuite/ls/ls-s-works b/testsuite/ls/ls-s-works
index 6c8bf36..0a9d752 100644
--- a/testsuite/ls/ls-s-works
+++ b/testsuite/ls/ls-s-works
@@ -1,4 +1,4 @@
 [ -n "$d" ] || d=..
 LC_ALL=C ls -1s "$d" > logfile.gnu
-busybox ls -1s "$d" > logfile.bb
-cmp logfile.gnu logfile.bb
+LC_ALL=C busybox ls -1s "$d" > logfile.bb
+diff -ubw logfile.gnu logfile.bb