Archive test results and image after running vm suite.

bin/cros_run_vm_test

Index: bin/cros_run_vm_test
diff --git a/bin/cros_run_vm_test b/bin/cros_run_vm_test
index 8ed9497ff913c61eaa09944f2c4de5331b704a57..cef3d115b992f9cae290879d1b1a5dc50524b708 100755
--- a/bin/cros_run_vm_test
+++ b/bin/cros_run_vm_test
@@ -17,6 +17,7 @@ get_default_board
 DEFINE_string board "$DEFAULT_BOARD" \
     "The board for which you built autotest."
 DEFINE_string image_path "" "Full path of the VM image"
+DEFINE_string results_dir_root "" "alternate root results directory"
 DEFINE_string test_case "" "Name of the test case to run"
 
 set -e
@@ -45,4 +46,5 @@ retry_until_ssh ${MAX_RETRIES}
   --board=${FLAGS_board} \
   --ssh_port=${FLAGS_ssh_port} \
   --remote=127.0.0.1 \
+  --results_dir_root="${FLAGS_results_dir_root}" \
   "${FLAGS_test_case}"