Switch devenv to use pkg packages

ports/gzip/build.sh

 # Copyright (c) 2015 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.
 
 EXECUTABLES=gzip${NACL_EXEEXT}
 
 ConfigureStep() {
   if [ "${NACL_LIBC}" = "newlib" ]; then
     NACLPORTS_CPPFLAGS+=" -I${NACLPORTS_INCLUDE}/glibc-compat"
   fi
 
   NACLPORTS_CPPFLAGS+=" -Dmain=nacl_main"
 
   NACLPORTS_LDFLAGS+=" ${NACL_CLI_MAIN_LIB}"
 
   export gzip_cv_assembler=no
   export gl_cv_header_wchar_h_correct_inline=yes
   if [ "${NACL_ARCH}" = pnacl ]; then
     NACLPORTS_CFLAGS+=" -std=gnu89"
     export ac_cv_type_signal=int
     export ac_cv_type_off_t=yes
   fi
 
   DefaultConfigureStep
 }
-
-PublishStep() {
-  PublishByArchForDevEnv
-}