Change Directory.list to use the input path, and not resolve it to a full path.

tests/standalone/io/file_system_links_test.dart

Index: tests/standalone/io/file_system_links_test.dart
diff --git a/tests/standalone/io/file_system_links_test.dart b/tests/standalone/io/file_system_links_test.dart
index 361f7e6eba02085342865ee5cefc6d6bd9b5c885..2de2aa067de95547a5140d119721409bdfddc56d 100644
--- a/tests/standalone/io/file_system_links_test.dart
+++ b/tests/standalone/io/file_system_links_test.dart
@@ -136,7 +136,7 @@ testDirectoryListing() {
       }
     }
     Expect.equals(1, files.length);
-    Expect.isTrue(files[0].endsWith(x));
+    Expect.isTrue(files[0].endsWith('$y${Platform.pathSeparator}x'));
     Expect.equals(1, dirs.length);
     Expect.isTrue(dirs[0].endsWith(y));
 
@@ -148,7 +148,7 @@ testDirectoryListing() {
     lister.onDone = (success) {
       Expect.isTrue(success);
       Expect.equals(1, files.length);
-      Expect.isTrue(files[0].endsWith(x));
+      Expect.isTrue(files[0].endsWith('$y${Platform.pathSeparator}x'));
       Expect.equals(1, dirs.length);
       Expect.isTrue(dirs[0].endsWith(y));
       temp.deleteSync(recursive: true);