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

ports/devenv/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.
 
-export EXTRA_LIBS="${NACL_CLI_MAIN_LIB}"
+EnableCliMain
 NACLPORTS_CPPFLAGS+=" -Dpipe=nacl_spawn_pipe"
 
 EXECUTABLES="tests/devenv_small_test_${NACL_ARCH}${NACL_EXEEXT} \
              jseval/jseval_${NACL_ARCH}${NACL_EXEEXT}"
 
 STORAGE_URL=https://naclports.storage.googleapis.com/builds
 SDK_VERSION=pepper_48
 BUILT_REVISION=trunk-703-gdb4edd8
 DEFAULT_SOURCE=${STORAGE_URL}/${SDK_VERSION}/${BUILT_REVISION}/publish
 LOCAL_SOURCE=http://localhost:5103
 
 BuildStep() {
   SetupCrossEnvironment
 
   # Build jseval module.
   MakeDir ${BUILD_DIR}/jseval
   LogExecute ${CC} ${CPPFLAGS} ${CFLAGS} ${LDFLAGS} -O2 \
       ${START_DIR}/jseval.c \
       -o ${BUILD_DIR}/jseval/jseval_${NACL_ARCH}${NACL_EXEEXT} \
-      ${EXTRA_LIBS}
+      ${LIBS}
 
   # Build test module.
   MakeDir ${BUILD_DIR}/tests
   LogExecute ${CXX} ${CPPFLAGS} ${CXXFLAGS} ${LDFLAGS} -g \
       ${START_DIR}/tests/devenv_small_test.cc \
       -o ${BUILD_DIR}/tests/devenv_small_test_${NACL_ARCH}${NACL_EXEEXT} \
-      -lgtest ${EXTRA_LIBS}
+      -lgtest ${LIBS}
 }
 
 InstallStep() {
   return
 }
 
 #
 # $1: Name of directory in which to create the conf file.
 # $2: The http address of repo.
 #
@@ skipping 131 matching lines @@
     # by the buildbots
     # TODO(sbc): reenable this.
     #if [[ "${BUILDBOT_BUILDERNAME:-}" != "" ]]; then
       #LogExecute python ${START_DIR}/../devenv/devenv_large_test.py \
         #-x -vv -a ${arch}
       #LogExecute python ${START_DIR}/../devenv/io2014_test.py \
         #-x -vv -a ${arch}
     #fi
   done
 }