Add asan android buildbot scripts

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"${JOBS}"
@@ skipping 42 matching lines @@
   local BUILDTOOL=$(bb_get_json_prop "$FACTORY_PROPERTIES" buildtool)
   if [[ $BUILDTOOL = ninja ]]; then
     export GYP_GENERATORS=ninja
   fi
   export GOMA_DIR=/b/build/goma
   . build/android/envsetup.sh
 
   local extra_gyp_defines="$(bb_get_json_prop "$FACTORY_PROPERTIES" \
      extra_gyp_defines)"
   export GYP_DEFINES+=" fastbuild=1 $extra_gyp_defines"
-  if echo $extra_gyp_defines | grep -q clang; then
+  if echo $extra_gyp_defines | grep -qE 'clang|asan'; then
     unset CXX_target
   fi
 
   adb kill-server
   adb start-server
 
   local build_path="${SRC_ROOT}/out/${BUILDTYPE}"
   local landmines_triggered_path="$build_path/.landmines_triggered"
   python "$SRC_ROOT/build/landmines.py"
 
@@ skipping 343 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', '')"
 }