Fixing bazel GUI packaging; still wip.

Change-Id: I754141f4b3975a95b4ded8fb1409491b45715ed9
diff --git a/tools/gui/BUILD b/tools/gui/BUILD
index 0073e2c..5e13405 100644
--- a/tools/gui/BUILD
+++ b/tools/gui/BUILD
@@ -10,6 +10,6 @@
     name = "tools-gui-gulp",
     srcs = [":_tools-gui-gulp-files"],
     outs = ["tools-gui-gulp.tar"],
-    cmd = "cd tools/gui && tar cf ../../$@ .",
+    cmd = "cd tools/gui && tar hcf ../../$@ .",
     visibility = ["//visibility:public"],
 )