Add top level build script for building packages.

ports/FreeImage/build.sh

 #!/bin/bash
 # 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.
 
 # This list of files needs to have CRLF (Windows)-style line endings translated
 # to LF (*nix)-style line endings prior to applying the patch.  This list of
 # files is taken from nacl-FreeImage-3.14.1.patch.
 readonly -a CRLF_TRANSLATE_FILES=(
     "Makefile"
     "Source/LibOpenJPEG/opj_includes.h"
     "Source/LibRawLite/dcraw/dcraw.c"
     "Source/LibRawLite/internal/defines.h"
     "Source/LibRawLite/libraw/libraw.h"
     "Source/LibRawLite/src/libraw_cxx.cpp"
     "Source/OpenEXR/Imath/ImathMatrix.h"
     "Source/Utilities.h")
 
-source pkg_info
 
 # The FreeImage zipfile, unlike other naclports contains a folder
 # called FreeImage rather than FreeImage-X-Y-Z, so we set a customr
 # PACKAGE_DIR here.
 PACKAGE_DIR=FreeImage
 
-source ../../build_tools/common.sh
 
 
 ExtractStep() {
   DefaultExtractStep
   # FreeImage uses CRLF for line-endings.  The patch file has LF (Unix-style)
   # line endings, which means on some versions of patch, the patch fails. Run a
   # recursive tr over all the sources to remedy this.
   # Setting LC_CTYPE is a Mac thing.  The locale needs to be set to "C" so that
   # tr interprets the '\r' string as ASCII and not UTF-8.
   ChangeDir ${NACL_PACKAGES_REPOSITORY}/${PACKAGE_DIR}
@@ skipping 24 matching lines @@
   # assumes pwd has makefile
   LogExecute make OS=nacl clean
   LogExecute make OS=nacl -j${OS_JOBS}
 }
 
 
 InstallStep() {
   # assumes pwd has makefile
   make OS=nacl install
 }
-
-
-PackageInstall
-exit 0