faft: Use new updater commands to unpack and repack

The --sb_{extract,repack} commands have been replaced by
 --unpack, --repack since R75.

BUG=chromium:882445
TEST=test_that IP firmware_FWupdate

Change-Id: I8abf488236a17a2ed946e74a715ccefb579ffefa
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1902554
Tested-by: Hung-Te Lin <hungte@chromium.org>
Auto-Submit: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Wai-Hong Tam <waihong@google.com>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
diff --git a/client/cros/faft/utils/firmware_updater.py b/client/cros/faft/utils/firmware_updater.py
index 4d904b8..48a78f2 100644
--- a/client/cros/faft/utils/firmware_updater.py
+++ b/client/cros/faft/utils/firmware_updater.py
@@ -446,7 +446,7 @@
             working_shellball = working_shellball + '-%s' % append
 
         self.os_if.run_shell_command(
-                'sh %s --sb_extract %s' % (working_shellball, self._work_path))
+                'sh %s --unpack %s' % (working_shellball, self._work_path))
 
         # use the json file that was extracted, to catch extraction problems.
         self._detect_image_paths()
@@ -473,7 +473,7 @@
             working_shellball = new_shellball
 
         self.os_if.run_shell_command(
-                'sh %s --sb_repack %s' % (working_shellball, self._work_path))
+                'sh %s --repack %s' % (working_shellball, self._work_path))
 
         # use the shellball that was repacked, to catch repacking problems.
         self._detect_image_paths(working_shellball)