Adds metacity to the install-build-deps.sh list so it gets installed on bots.

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 c891f2709da576de67628f3796bb3e3a72d2873a..4cb5165a0c0fb761dc6ce361ef9468ff44dac04f 100755
--- a/build/install-build-deps.sh
+++ b/build/install-build-deps.sh
@@ -75,9 +75,9 @@ dev_list="apache2.2-bin bison curl elfutils fakeroot flex g++ gperf
           libgnome-keyring-dev libgtk2.0-dev libkrb5-dev libnspr4-dev
           libnss3-dev libpam0g-dev libpci-dev libsctp-dev libspeechd-dev
           libsqlite3-dev libssl-dev libudev-dev libwww-perl libxslt1-dev
-          libxss-dev libxt-dev libxtst-dev mesa-common-dev patch perl php5-cgi
-          pkg-config python python-cherrypy3 python-dev python-psutil rpm ruby
-          subversion ttf-dejavu-core ttf-indic-fonts ttf-kochi-gothic
+          libxss-dev libxt-dev libxtst-dev mesa-common-dev metacity patch perl
+          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 git-core
           $chromeos_dev_list"