Update Clang on the ASan Android test runner.

build/android/buildbot/buildbot_functions.sh

 #!/bin/bash
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # Bash functions used by buildbot annotator scripts for the android
 # build of chromium.  Executing this script should not perform actions
 # other than setting variables and defining of functions.
 
 # Number of jobs on the compile line; e.g.  make -j"${JOBS}"
@@ skipping 75 matching lines @@
     fi
   fi
 }
 
 function bb_compile_setup {
   bb_setup_goma_internal
   # Should be called only after envsetup is done.
   gclient runhooks
 }
 
+function bb_asan_tests_setup {
+  # Download or build the ASan runtime library.
+  ${SRC_ROOT}/tools/clang/scripts/update.sh
+}
+
 # Setup goma.  Used internally to buildbot_functions.sh.
 function bb_setup_goma_internal {
   export GOMA_API_KEY_FILE=${GOMA_DIR}/goma.key
   export GOMA_COMPILER_PROXY_DAEMON_MODE=true
   export GOMA_COMPILER_PROXY_RPC_TIMEOUT_SECS=300
 
   echo "Killing old goma processes"
   ${GOMA_DIR}/goma_ctl.sh stop || true
   killall -9 compiler_proxy || true
 
@@ skipping 182 matching lines @@
   )
 }
 
 # Retrieve a packed json property using python
 function bb_get_json_prop {
   local JSON="$1"
   local PROP="$2"
 
   python -c "import json; print json.loads('$JSON').get('$PROP', '')"
 }