Add python-yaml to install-build-deps

build/install-build-deps.sh

 #!/bin/bash -e
 
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Script to install everything needed to build chromium (well, ideally, anyway)
 # See http://code.google.com/p/chromium/wiki/LinuxBuildInstructions
 # and http://code.google.com/p/chromium/wiki/LinuxBuild64Bit
 
@@ skipping 91 matching lines @@
           language-pack-fr language-pack-he language-pack-zh-hant
           libapache2-mod-php5 libasound2-dev libbrlapi-dev libav-tools
           libbz2-dev libcairo2-dev libcap-dev libcups2-dev libcurl4-gnutls-dev
           libdrm-dev libelf-dev libexif-dev libgconf2-dev libglib2.0-dev
           libglu1-mesa-dev libgnome-keyring-dev libgtk2.0-dev libkrb5-dev
           libnspr4-dev libnss3-dev libpam0g-dev libpci-dev libpulse-dev
           libsctp-dev libspeechd-dev libsqlite3-dev libssl-dev libudev-dev
           libwww-perl libxslt1-dev libxss-dev libxt-dev libxtst-dev openbox
           patch perl php5-cgi pkg-config python python-cherrypy3 python-crypto
           python-dev python-numpy python-opencv python-openssl python-psutil
-          rpm ruby subversion ttf-dejavu-core ttf-indic-fonts ttf-kochi-gothic
-          ttf-kochi-mincho wdiff xfonts-mathml zip $chromeos_dev_list"
+          python-yaml rpm ruby subversion ttf-dejavu-core ttf-indic-fonts
+          ttf-kochi-gothic ttf-kochi-mincho wdiff xfonts-mathml zip
+          $chromeos_dev_list"
 
 # 64-bit systems need a minimum set of 32-bit compat packages for the pre-built
 # NaCl binaries.
 if file /sbin/init | grep -q 'ELF 64-bit'; then
   dev_list="${dev_list} libc6-i386 lib32gcc1 lib32stdc++6"
 fi
 
 # Run-time libraries required by chromeos only
 chromeos_lib_list="libpulse0 libbz2-1.0"
 
@@ skipping 328 matching lines @@
   # only contains libcrypto.so.1.0.0 and not the symlink needed for
   # linking (libcrypto.so).
   create_library_symlink /lib/i386-linux-gnu/libcrypto.so.1.0.0 \
       /usr/lib/i386-linux-gnu/libcrypto.so
 
   create_library_symlink /lib/i386-linux-gnu/libssl.so.1.0.0 \
       /usr/lib/i386-linux-gnu/libssl.so
 else
   echo "Skipping symbolic links for NaCl."
 fi