Allow running adb_gdb in a subdirectory of src/.

build/android/adb_gdb

 #!/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.
 #
 
 # A generic script used to attach to a running Chromium process and
 # debug it. Most users should not use this directly, but one of the
 # wrapper scripts like adb_gdb_content_shell
@@ skipping 320 matching lines @@
 
 EOF
   exit 0
 fi
 
 if [ -z "$PACKAGE_NAME" ]; then
   panic "Please specify a package name on the command line. See --help."
 fi
 
 if [ -z "$NDK_DIR" ]; then
-  ANDROID_NDK_ROOT=$(PYTHONPATH=build/android python -c \
+  ANDROID_NDK_ROOT=$(PYTHONPATH=$CHROMIUM_SRC/build/android python -c \
 'from pylib.constants import ANDROID_NDK_ROOT; print ANDROID_NDK_ROOT,')
 else
   if [ ! -d "$NDK_DIR" ]; then
     panic "Invalid directory: $NDK_DIR"
   fi
   if [ ! -f "$NDK_DIR/ndk-build" ]; then
     panic "Not a valid NDK directory: $NDK_DIR"
   fi
   ANDROID_NDK_ROOT=$NDK_DIR
 fi
@@ skipping 653 matching lines @@
 
 if [ "$VERBOSE" -gt 0 ]; then
   echo "### START $COMMANDS"
   cat $COMMANDS
   echo "### END $COMMANDS"
 fi
 
 log "Launching gdb client: $GDB $GDB_ARGS -x $COMMANDS"
 $GDB $GDB_ARGS -x $COMMANDS &&
 rm -f "$GDBSERVER_PIDFILE"