Switch devenv to use pkg packages

ports/subversion/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.
 
 # subversion's build system seem to have a bug with out-of-tree builds
 # and parallel building that was causing occational flakes on the buildbots.
 # The mkdir-init target appears to be required before any object file can be
 # built but none of the object files seem to depend on this.
 OS_JOBS=1
 
 NACLPORTS_CPPFLAGS+=" -Dmain=nacl_main"
 
 export LIBS="${NACL_CLI_MAIN_LIB}"
 
 EXTRA_CONFIGURE_ARGS="--with-apr=${NACL_PREFIX}"
 EXTRA_CONFIGURE_ARGS+=" --with-apr-util=${NACL_PREFIX}"
 EXTRA_CONFIGURE_ARGS+=" --enable-all-static"
 
 if [ "${NACL_LIBC}" = "newlib" ]; then
   NACLPORTS_CPPFLAGS+=" -I${NACLPORTS_INCLUDE}/glibc-compat"
   export LIBS+=" -lglibc-compat"
 fi
-
-InstallStep() {
-  return
-}
-
-PublishStep() {
-  PublishByArchForDevEnv
-}
-