Fix STEP_WARNINGS for android buildbot

build/android/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"${JOBS}"
@@ skipping 162 matching lines @@
     TARGET_CC="$TARGET_CC" \
     TARGET_CXX="$TARGET_CXX" \
     CC.host="$HOST_CC" \
     CXX.host="$HOST_CXX" \
     CC.target="$TARGET_CC" \
     CXX.target="$TARGET_CXX" \
     LINK.target="$TARGET_CXX" \
     COMMON_JAVAC="$COMMON_JAVAC" \
     "$@"
 
+  local make_exit_status=$?
   bb_stop_goma_internal
+  return $make_exit_status
 }
 
 # Compile step
 function bb_compile {
   # This must be named 'compile', not 'Compile', for CQ interaction.
   # Talk to maruel for details.
   echo "@@@BUILD_STEP compile@@@"
   bb_goma_make
 }
 
@@ skipping 36 matching lines @@
 function bb_run_tests {
   echo "@@@BUILD_STEP Run Tests on actual hardware@@@"
   build/android/run_tests.py --xvfb --verbose
 }
 
 # Run APK tests on an actual device.
 function bb_run_apk_tests {
   echo "@@@BUILD_STEP Run APK Tests on actual hardware@@@"
   build/android/run_tests.py --xvfb --verbose --apk=True
 }