adb: disable test_device.FileOperationsTest.test_pull_symlink_dir.

selinux prevents us from doing this.

Test: python test_device.py
Change-Id: I7117dd19348b0764638977b7c958331a4839ea4f
diff --git a/adb/test_device.py b/adb/test_device.py
index c8a4d9b..42aadc4 100644
--- a/adb/test_device.py
+++ b/adb/test_device.py
@@ -1033,7 +1033,8 @@
             if host_dir is not None:
                 shutil.rmtree(host_dir)
 
-    def test_pull_symlink_dir(self):
+    # selinux prevents adbd from accessing symlinks on /data/local/tmp.
+    def disabled_test_pull_symlink_dir(self):
         """Pull a symlink to a directory of symlinks to files."""
         try:
             host_dir = tempfile.mkdtemp()