Update SDK on release-R89-13729.B branch.

In order to resolve CVE-2020-10029 in glibc, patch was added as part of
https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/3095655.
Following the instructions in go/cros-toolchain-hotfixes, updating the
version to new SDK.

Build URL:
https://ci.chromium.org/ui/p/chromeos/builders/general/Full/b8837813671632673281/overview

ChromeOS commit:
https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/3098925

BUG=b/179882421
TEST=presubmit
RELEASE_NOTE=None

cos-patch: lts-refresh
Change-Id: Id3236e9b6a0f8949df64a382597c9ce7454a4be7
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/21905
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
diff --git a/chromeos/binhost/host/sdk_version.conf b/chromeos/binhost/host/sdk_version.conf
index 699fe07..db7b3a1 100644
--- a/chromeos/binhost/host/sdk_version.conf
+++ b/chromeos/binhost/host/sdk_version.conf
@@ -1,8 +1,8 @@
 # The last version of the sdk that we built & tested.
-SDK_LATEST_VERSION="2021.01.12.160747"
+SDK_LATEST_VERSION="2021.08.26.131614"
 
 # How to find the standalone toolchains from the above sdk.
-TC_PATH="2021/01/%(target)s-2021.01.12.160747.tar.xz"
+TC_PATH="2021/08/%(target)s-2021.08.26.131614.tar.xz"
 
 # Frozen version of SDK used for bootstrapping.
 # If unset, SDK_LATEST_VERSION will be used for bootstrapping.
diff --git a/chromeos/config/make.conf.amd64-host b/chromeos/config/make.conf.amd64-host
index 3c26b97..c58ed91 100644
--- a/chromeos/config/make.conf.amd64-host
+++ b/chromeos/config/make.conf.amd64-host
@@ -18,7 +18,7 @@
 PORT_LOGDIR="/var/log/portage"
 
 source /usr/local/portage/chromiumos/chromeos/binhost/host/amd64-PREFLIGHT_BINHOST.conf
-FULL_BINHOST="gs://chromeos-prebuilt/host/amd64/amd64-host/chroot-2021.01.12.160747/packages/"
+FULL_BINHOST="gs://chromeos-prebuilt/host/amd64/amd64-host/chroot-2021.08.26.131614/packages/"
 PORTAGE_BINHOST="$PREFLIGHT_BINHOST $FULL_BINHOST"
 
 GENTOO_MIRRORS="https://commondatastorage.googleapis.com/chromeos-localmirror"