temporary make build fix

chrome/tools/build/mac/verify_no_objc.sh

 #!/bin/bash
 
 # Copyright (c) 2011 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.
 
 # This script makes sure that no __OBJC,__image_info section appears in the
 # executable file built by the Xcode target that runs the script. If such a
 # section appears, the script prints an error message and exits nonzero.
 #
 # Why is this important?
 #
 # On 10.5, there's a bug in CFBundlePreflightExecutable that causes it to
 # crash when operating in an executable that has not loaded at its default
 # address (that is, when it's a position-independent executable with the
 # MH_PIE bit set in its mach_header) and the executable has an
 # __OBJC,__image_info section. See http://crbug.com/88697.
 #
 # Chrome's main executables don't use any Objective-C at all, and don't need
 # to carry this section around. Not linking them as Objective-C when they
 # don't need it anyway saves about 4kB in the linked executable, although most
 # of that 4kB is just filled with zeroes.
 #
 # This script makes sure that nobody goofs and accidentally introduces these
 # sections into the main executables.
 
 set -eu
 
-otool="${DEVELOPER_BIN_DIR}/otool"
+otool="${DEVELOPER_BIN_DIR:-/usr/bin}/otool"
 executable="${BUILT_PRODUCTS_DIR}/${EXECUTABLE_PATH}"
 
 if "${otool}" -arch i386 -o "${executable}" | grep -q '^Contents.*section$'; \
 then
   echo "${0}: ${executable} has an __OBJC,__image_info section" 2>&1
   exit 1
 fi
 
 if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
   echo "${0}: otool failed" 2>&1
   exit 1
 fi
 
 exit 0