Update Clang and Go on the bots.

I've left libc++ and Android tools for now. libc++ is running into
https://crbug.com/1166707. I'm not sure what's wrong with the Android
tools. (CMAKE_LINKER isn't defined for some reason, but it's defined on
my machine.)

We'll also want to update the builders before the NDK anyway. The new
NDK now defaults to ANDROID_ARM_NEON=TRUE.

Change-Id: I1c0fbc3e26368c04d31464477a51e04209aec7ba
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/45544
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

util/bot/DEPS

diff --git a/util/bot/DEPS b/util/bot/DEPS
index b1f9d80..a5086ba 100644
--- a/util/bot/DEPS
+++ b/util/bot/DEPS
@@ -25,6 +25,10 @@
 }
 
 deps = {
+  # TODO(davidben): Before updating this, update the builders to specify
+  # ANDROID_ARM_NEON=0. The NDK now defaults armeabi-v7a to assuming NEON, but
+  # we wish to retain test coverage for non-NEON code. (Perhaps worth having
+  # both configurations.)
   'boringssl/util/bot/android_ndk': {
     'url': Var('chromium_git') + '/android_ndk.git' + '@' + '27c0a8d090c666a50e40fceb4ee5b40b1a2d3f87',
     'condition': 'checkout_android',

util/bot/go/bootstrap.py

diff --git a/util/bot/go/bootstrap.py b/util/bot/go/bootstrap.py
index c58504c..0765bb5 100755
--- a/util/bot/go/bootstrap.py
+++ b/util/bot/go/bootstrap.py
@@ -45,7 +45,7 @@
 EXE_SFX = '.exe' if sys.platform == 'win32' else ''
 
 # Pinned version of Go toolset to download.
-TOOLSET_VERSION = 'go1.15.3'
+TOOLSET_VERSION = 'go1.16'
 
 # Platform dependent portion of a download URL. See http://golang.org/dl/.
 TOOLSET_VARIANTS = {

util/bot/update_clang.py

diff --git a/util/bot/update_clang.py b/util/bot/update_clang.py
index 71c55db..f959280 100644
--- a/util/bot/update_clang.py
+++ b/util/bot/update_clang.py
@@ -19,8 +19,8 @@
 # CLANG_REVISION and CLANG_SUB_REVISION determine the build of clang
 # to use. These should be synced with tools/clang/scripts/update.py in
 # Chromium.
-CLANG_REVISION = 'llvmorg-12-init-5627-gf086e85e'
-CLANG_SUB_REVISION = 2
+CLANG_REVISION = 'llvmorg-13-init-794-g83e2710e'
+CLANG_SUB_REVISION = 1
 
 PACKAGE_VERSION = '%s-%s' % (CLANG_REVISION, CLANG_SUB_REVISION)