Add a script to build exactly like the chrome buildbot.

The buildbot will use that script directly.

Change-Id: I837432f1e1e9b9d238d91de9af51ad955f7cd76d
diff --git a/tools/buildbot-build.sh b/tools/buildbot-build.sh
new file mode 100755
index 0000000..192ee6d
--- /dev/null
+++ b/tools/buildbot-build.sh
@@ -0,0 +1,77 @@
+#!/bin/bash
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+if [ ! -d art ]; then
+  echo "Script needs to be run at the root of the android tree"
+  exit 1
+fi
+
+common_targets="vogar vogar.jar core-tests apache-harmony-jdwp-tests-hostdex out/host/linux-x86/bin/adb jsr166-tests"
+android_root="/data/local/tmp/system"
+linker="linker"
+mode="target"
+j_arg="-j$(nproc)"
+make_command=
+
+if [[ "$TARGET_PRODUCT" == "armv8" ]]; then
+  linker="linker64"
+fi
+
+if [[ "$ART_TEST_ANDROID_ROOT" != "" ]]; then
+  android_root="$ART_TEST_ANDROID_ROOT"
+fi
+
+while true; do
+  if [[ "$1" == "--host" ]]; then
+    mode="host"
+    shift
+  elif [[ "$1" == "--target" ]]; then
+    mode="target"
+    shift
+  elif [[ "$1" == "--32" ]]; then
+    linker="linker"
+    shift
+  elif [[ "$1" == "--64" ]]; then
+    linker="linker64"
+    shift
+  elif [[ "$1" == "--android-root" ]]; then
+    shift
+    android_root=$1
+    shift
+  elif [[ "$1" == -j* ]]; then
+    j_arg = $1
+    shift
+  elif [[ "$1" == "" ]]; then
+    break
+  fi
+done
+
+if [[ $mode == "host" ]]; then
+  make_command="make $j_arg build-art-host-tests $common_targets"
+  echo "Executing $make_command"
+  $make_command
+elif [[ $mode == "target" ]]; then
+  # We need to provide our own linker in case the linker on the device
+  # is out of date.
+  env="TARGET_GLOBAL_LDFLAGS=-Wl,-dynamic-linker=$android_root/bin/$linker"
+  # Use '-e' to force the override of TARGET_GLOBAL_LDFLAGS.
+  # Also, we build extra tools that will be used by tests, so that
+  # they are compiled with our own linker.
+  make_command="make -e $j_arg build-art-target-tests $common_targets libjavacrypto linker toybox toolbox sh"
+  echo "Executing env $env $make_command"
+  env $env $make_command
+fi
+