Autotest: Update lab repair image.

Bumped the repair image to R34-5500.71.0

BUG=chromium:353315
TEST=None

Change-Id: I8b5d5f5f1f3302cefe6943ff662db694c7cfb92d
Reviewed-on: https://chromium-review.googlesource.com/190890
Reviewed-by: Prashanth B <beeps@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
Commit-Queue: Simran Basi <sbasi@chromium.org>
diff --git a/global_config.ini b/global_config.ini
index 81940a1..e9b5df8 100644
--- a/global_config.ini
+++ b/global_config.ini
@@ -150,7 +150,7 @@
 serve_packages_from_autoserv: True
 
 [CROS]
-stable_cros_version: R34-5278.0.0
+stable_cros_version: R34-5500.71.0
 stable_build_pattern: %s-release/%s
 # The zone that all Chrome OS devices are in if they are in a lab.
 dns_zone: cros.corp.google.com