Fix binutils, gcc, gcc-avr in devenv (after roll).

ports/gcc-avr/build.sh

 # Copyright 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.
 
 HOST_BUILD_DIR=${WORK_DIR}/build_host
 HOST_BIN_INSTALL_DIR=${NACL_PACKAGES_BUILD}/binutils-2.25/install_host
 
 AVR_LIBC_URL=http://storage.googleapis.com/webports/mirror/avr-libc-1.8.1.tar.bz2
 AVR_LIBC_SHA=b56fe21b30341869aa768689b0f6a07d896b17fa
 AVR_LIBC_VERSION=avr-libc-1.8.1
 
+EnableCliMain
 export EXTRA_LIBS="${NACL_CLI_MAIN_LIB}"
 export PATH="${PATH}:${NACL_PACKAGES_BUILD}/binutils-2.25/install_host/bin"
 NACLPORTS_CPPFLAGS+=" -Dpipe=nacl_spawn_pipe"
 
 if [ "${NACL_LIBC}" = "newlib" ]; then
   export EXTRA_INCLUDES=" -I${NACLPORTS_INCLUDE}/glibc-compat"
 fi
 
 BuildHostGccAvr() {
   # Host avr-gcc already installed, skip install.
@@ skipping 69 matching lines @@
 
   # avr-libc needs to be in the same directory as the gcc-avr install
   cp -r ${WORK_DIR}/avr_libc_install/* ${INSTALL_DIR}/webports-dummydir
 }
 
 InstallStep() {
   DefaultInstallStep
   AvrLibcDownload
   AvrLibcExtractAndInstall
 }