CHERRY-PICK: Revert "Make host-based factory toolkit the default" in 6420 branch

This reverts commit c0dc8340b18ad4763ebebbb925515e99969182cb

We got a few factory UI bring up issues in this branch.
It looks like host-based testing is not very stable yet.
Revert this CL to use non host-based testing for auron series devices.

BUG=chrome-os-partner:36730
TEST=None

Original-Change-Id: I99a8b0d412aefaadb5987c480de888a3cdacdbd5
Reviewed-on: https://chromium-review.googlesource.com/235580
Commit-Queue: Bowgo Tsai <bowgotsai@chromium.org>
Tested-by: Bowgo Tsai <bowgotsai@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
(cherry picked from commit 50a0b38647ad57b68fb052e28fcaf4a9a822ed17)

Change-Id: I84b69f5fdaef29229e2c133a5a9f954a3bbd6c95
Reviewed-on: https://chromium-review.googlesource.com/254031
Reviewed-by: Bowgo Tsai <bowgotsai@chromium.org>
Commit-Queue: Bowgo Tsai <bowgotsai@chromium.org>
Tested-by: Bowgo Tsai <bowgotsai@chromium.org>
diff --git a/make_factory_toolkit.sh b/make_factory_toolkit.sh
index 5e3ce9f..63412c6 100755
--- a/make_factory_toolkit.sh
+++ b/make_factory_toolkit.sh
@@ -19,7 +19,7 @@
 DEFINE_string output_dir "" "Path to the folder to store the factory toolkit."
 DEFINE_string version "" \
   "The version tag to be included in the identification string."
-DEFINE_boolean host_based "${FLAGS_TRUE}" \
+DEFINE_boolean host_based "${FLAGS_FALSE}" \
   "Whether to build a host-based toolkit."
 
 cleanup() {