[Ubuntu Install Script] Automatically enable mod_rewrite

Summary: I needed to figure out how to do this, and it took a couple of minutes.

Test Plan: ran that command on my Ubuntu 12.04 system

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3479

scripts/install/install_ubuntu.sh

@@ -45,6 +45,9 @@ set +x
 sudo apt-get -qq update
 sudo apt-get install $GIT mysql-server apache2 php5 php5-mysql php5-gd php5-dev php5-curl php-apc php5-cli dpkg-dev
 
+# Enable mod_rewrite
+sudo a2enmod rewrite
+
 HAVEPCNTL=`php -r "echo extension_loaded('pcntl');"`
 if [ $HAVEPCNTL != "1" ]
 then