Update tools from Chromium.

Change-Id: Ied9713decf536c0fd7b25c9156fd8eb167ee57d1
Reviewed-on: https://boringssl-review.googlesource.com/17244
Reviewed-by: Steven Valdez <svaldez@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
diff --git a/util/bot/DEPS b/util/bot/DEPS
index 3047f14..0e1b7dc 100644
--- a/util/bot/DEPS
+++ b/util/bot/DEPS
@@ -24,7 +24,7 @@
 deps_os = {
   'android': {
     'boringssl/util/bot/android_tools':
-      Var('chromium_git') + '/android_tools.git' + '@' + 'cb6bc21107001e2f2eeee2707b482b2b755baf51',
+      Var('chromium_git') + '/android_tools.git' + '@' + '023e2f65409a2b7886b8d644d6a88542ead6cd0a',
   },
   'unix': {
     'boringssl/util/bot/libFuzzer':
diff --git a/util/bot/go/bootstrap.py b/util/bot/go/bootstrap.py
index 3b82ab2..407d306 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 = 'go1.8.1'
+TOOLSET_VERSION = 'go1.8.3'
 
 # Platform dependent portion of a download URL. See http://golang.org/dl/.
 TOOLSET_VARIANTS = {
diff --git a/util/bot/update_clang.py b/util/bot/update_clang.py
index d23abfc..3fd59a3 100644
--- a/util/bot/update_clang.py
+++ b/util/bot/update_clang.py
@@ -22,7 +22,7 @@
 # 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 = "300839"
+CLANG_REVISION = "305281"
 CLANG_SUB_REVISION = "1"
 
 PACKAGE_VERSION = "%s-%s" % (CLANG_REVISION, CLANG_SUB_REVISION)