Add python-yaml to install-build-deps

build/install-build-deps.sh

Index: build/install-build-deps.sh
diff --git a/build/install-build-deps.sh b/build/install-build-deps.sh
index be0780dd7509bdfed383d2d1b94cb6b0c63e56d2..0c39d8709dfe24718d869cea10c3832a9fde7983 100755
--- a/build/install-build-deps.sh
+++ b/build/install-build-deps.sh
@@ -109,8 +109,9 @@ dev_list="apache2.2-bin bison cdbs curl dpkg-dev elfutils devscripts fakeroot
           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.