Remove use of --no-preserve=mode argument to 'cp'

ports/gtest/build.sh

 # Copyright (c) 2011 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 CTEST_EXECUTABLES="
 gtest_break_on_failure_unittest_
 gtest_catch_exceptions_ex_test_
 gtest_catch_exceptions_no_ex_test_
 gtest_color_test_
 gtest_env_var_test_
@@ skipping 60 matching lines @@
 }
 
 BuildStep() {
   return
 }
 
 InstallStep() {
   local srcdir=${DESTDIR}/${PREFIX}/src
   MakeDir ${srcdir}/gtest/include
 
-  LogExecute cp -r --no-preserve=mode ${SRC_DIR}/include/gtest \
-    ${srcdir}/gtest/include/gtest
-
-  LogExecute cp -r --no-preserve=mode ${SRC_DIR}/src ${srcdir}/gtest
+  LogExecute cp -r ${SRC_DIR}/include/gtest ${srcdir}/gtest/include/gtest
+  LogExecute cp -r ${SRC_DIR}/src ${srcdir}/gtest
 }
 
 TestStep() {
   if [[ -z ${GTEST_TEST:-} ]]; then
     Banner "Skipping tests (set GTEST_TEST to enable)"
     return
   fi
   DefaultBuildStep
   if [ "${NACL_ARCH}" = "pnacl" ]; then
     return
   fi
   for exe in $CTEST_EXECUTABLES; do
     mv $exe $exe$NACL_EXEEXT
     WriteLauncherScript $exe $exe$NACL_EXEEXT
   done
   LogExecute make TZ=gmt test
 }