Removed extra c in path to distro files.

cluster/juju/prereqs/ubuntu-juju.sh

@@ -22,7 +22,7 @@ set -o pipefail
 
 function check_for_ppa() {
     local repo="$1"
-    grep -qsw $repo /etcc/apt/sources.list /etc/apt/sources.list.d/*
+    grep -qsw $repo /etc/apt/sources.list /etc/apt/sources.list.d/*
 }
 
 function package_status() {
@@ -33,7 +33,6 @@ function package_status(){
         echo "Missing package ${pkgname}"
         sudo apt-get --force-yes --yes install ${pkgname}
     fi
-
 }
 
 function gather_installation_reqs() {