Fix sed-delete command on homebrew install

scripts/homebrew.sh

@@ -6,5 +6,5 @@ su ${USERNAME} -c "ruby -e \"$(curl -fsSL https://raw.githubusercontent.com/Home
 su ${USERNAME} -c "brew install curl git"
 
 # changes path setup for all users, puts homebrew first
-sed -e ';^/usr/local;d' -i /etc/paths
+sed -e '/^\/usr\/local/d' -i .orig /etc/paths
 echo -e "/usr/local/bin\n/usr/local/sbin\n$(cat /etc/paths)" > /etc/paths