Update ARM trusted root image to include libcap2 and remove libbz2.

tools/trusted_cross_toolchains/trusted-toolchain-creator.armhf.precise.sh

 #!/bin/bash
 # Copyright (c) 2012 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.
 #
 #@ This script builds the (trusted) cross toolchain for arm.
 #@ It must be run from the native_client/ directory.
 #@
 #@ The toolchain consists primarily of a jail with arm header and libraries.
 #@ It also provides additional tools such as QEMU.
@@ skipping 95 matching lines @@
 readonly ARMEL_BASE_DEP_LIST="${SCRIPT_DIR}/packagelist.precise.armhf.base"
 readonly ARMEL_BASE_DEP_FILES="$(cat ${ARMEL_BASE_DEP_LIST})"
 
 readonly ARMEL_EXTRA_PACKAGES="\
   comerr-dev \
   krb5-multidev \
   libasound2 \
   libasound2-dev \
   libatk1.0-0 \
   libatk1.0-dev \
-  libbz2-1.0 \
-  libbz2-dev \
   libcairo2 \
   libcairo2-dev \
   libcairo-gobject2 \
   libcairo-script-interpreter2 \
   libcomerr2 \
   libcups2 \
   libcups2-dev \
   libdbus-1-3 \
   libdbus-1-dev \
   libexpat1 \
@@ skipping 30 matching lines @@
   libkrb5-3 \
   libkrb5-dev \
   libkrb5support0 \
   libk5crypto3 \
   libnspr4 \
   libnspr4-dev \
   libnss3 \
   libnss3-dev \
   libnss-db \
   liborbit2 \
+  libcap-dev \
+  libcap2 \
   libpam0g \
   libpam0g-dev \
   libpango1.0-0 \
   libpango1.0-dev \
   libpci3 \
   libpci-dev \
   libpcre3 \
   libpcre3-dev \
   libpcrecpp0 \
   libpixman-1-0 \
@@ skipping 392 matching lines @@
 elif [[ "$(type -t $1)" != "function" ]]; then
   echo "ERROR: unknown function '$1'." >&2
   echo "For help, try:"
   echo "    $0 help"
   exit 1
 else
   ChangeDirectory
   SanityCheck
   "$@"
 fi