gs: update to 4.30

BUG=None
TEST=`./gs_unittest --network` passes, as do paygen tests

Change-Id: I92f616477dc3d76b021cd1950889f5a1012b9f24
Reviewed-on: https://chromium-review.googlesource.com/986533
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
(cherry picked from commit 1ab6d9ad52a6ec02aeafcc8c574e511e5817ceef)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2123453
Reviewed-by: Mike Frysinger <vapier@chromium.org>
(cherry picked from commit bc48e18b167799b4bcf25c0afb7ea99fbad5af37)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2143876
Auto-Submit: Yu-hsuan Lin <amylin@google.com>
Reviewed-by: Chinyue Chen <chinyue@chromium.org>
Commit-Queue: Chinyue Chen <chinyue@chromium.org>
Tested-by: Yu-hsuan Lin <amylin@google.com>
diff --git a/lib/gs.py b/lib/gs.py
index 159a734..f7ac1fc 100644
--- a/lib/gs.py
+++ b/lib/gs.py
@@ -257,7 +257,7 @@
   # (1*sleep) the first time, then (2*sleep), continuing via attempt * sleep.
   DEFAULT_SLEEP_TIME = 60
 
-  GSUTIL_VERSION = '4.27'
+  GSUTIL_VERSION = '4.30'
   GSUTIL_TAR = 'gsutil_%s.tar.gz' % GSUTIL_VERSION
   GSUTIL_URL = (PUBLIC_BASE_HTTPS_URL +
                 'chromeos-mirror/gentoo/distfiles/%s' % GSUTIL_TAR)