Add python-cherrypy3 build dependency for CNS.

Required for the Constrained Network Server (CNS) used by video tag
testing. See code under media/tools/constrained_network_server.

BUG=104242
TEST=Installed dep, verified server ran.


Review URL: http://codereview.chromium.org/8879060

git-svn-id: http://src.chromium.org/svn/trunk/src/build@114325 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

install-build-deps.sh

@@ -110,8 +110,8 @@ dev_list="apache2.2-bin bison curl elfutils fakeroot flex g++ gperf
           libkrb5-dev libnspr4-dev libnss3-dev libpam0g-dev libsctp-dev
           libsqlite3-dev libssl-dev libwww-perl libxslt1-dev libxss-dev
           libxt-dev libxtst-dev mesa-common-dev msttcorefonts patch perl
-          php5-cgi pkg-config python python-dev python-psutil rpm ruby
-          subversion ttf-dejavu-core ttf-indic-fonts ttf-kochi-gothic
+          php5-cgi pkg-config python python-cherrypy3 python-dev python-psutil
+          rpm ruby subversion ttf-dejavu-core ttf-indic-fonts ttf-kochi-gothic
           ttf-kochi-mincho ttf-thai-tlwg wdiff
           $chromeos_dev_list"