Switch from using 'nacl_main' to 'main' entry point

ports/openssh/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.
 
 EXECUTABLES="scp${NACL_EXEEXT} ssh${NACL_EXEEXT} \
              ssh-add${NACL_EXEEXT} sshd${NACL_EXEEXT}"
 INSTALL_TARGETS="install-nokeys"
 
 # Add --with-privsep-path otherwise openssh creates /var/empty
 # in the root of DESTDIR.
 EXTRA_CONFIGURE_ARGS="--with-privsep-path=${PREFIX}/var/empty"
 
 # Force configure to recognise the existence of truncate
 # and sigaction.  Normally it will detect that both this functions
 # are implemented by glibc in terms of NOSYS.
 export ac_cv_func_truncate=yes
 export ac_cv_func_sigaction=yes
 
-export SSHLIBS="${NACL_CLI_MAIN_LIB}"
 if [ "${NACL_LIBC}" = "newlib" ]; then
   NACLPORTS_LIBS+=" -lcrypto"
   export LD="${NACLCXX}"
 fi
 
 if [ "${NACL_LIBC}" = "glibc" ]; then
   # The host version of 'strip' doesn't always recognise NaCl binaries
   # and ssh runs 'install -s' which doesn't always runs the host 'strip'
   EXTRA_CONFIGURE_ARGS+=" --disable-strip"
 fi
 
+EnableCliMain
 EnableGlibcCompat
 
 PublishStep() {
-  DefaultInstallStep
-
   MakeDir ${PUBLISH_DIR}
   local ASSEMBLY_DIR="${PUBLISH_DIR}/openssh"
   MakeDir ${ASSEMBLY_DIR}
   LogExecute cp ssh${NACL_EXEEXT} \
       ${ASSEMBLY_DIR}/ssh_${NACL_ARCH}${NACL_EXEEXT}
 
   pushd ${ASSEMBLY_DIR}
   LogExecute python ${NACL_SDK_ROOT}/tools/create_nmf.py \
       ssh_*${NACL_EXEEXT} \
       -s . \
       -o openssh.nmf
   LogExecute python ${TOOLS_DIR}/create_term.py openssh.nmf
   popd
 
   InstallNaClTerm ${ASSEMBLY_DIR}
   LogExecute cp ${START_DIR}/background.js ${ASSEMBLY_DIR}
   LogExecute cp ${START_DIR}/manifest.json ${ASSEMBLY_DIR}
 }