Switch devenv to use pkg packages

ports/grep/build.sh

 # Copyright (c) 2014 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.
 
 ConfigureStep() {
   if [ "${NACL_LIBC}" = "newlib" ]; then
     NACLPORTS_CPPFLAGS+=" -I${NACLPORTS_INCLUDE}/glibc-compat"
   fi
 
   export LIBS+=" -l${NACL_CXX_LIB}"
 
   NACLPORTS_CPPFLAGS+=" -Dpipe=nacl_spawn_pipe"
 
   # Grep fails to build NDEBUG defined
   # ib/chdir-long.c:62: error: unused variable 'close_fail'
   NACLPORTS_CFLAGS="${NACLPORTS_CFLAGS/-DNDEBUG/}"
   DefaultConfigureStep
 }
-
-PublishStep() {
-  PublishByArchForDevEnv
-}