Update locations for new infrastructure

I doubt this script should be part of the repo. As of today, it is
served, and in case of self-upgrade, things will derail quickly...

update_opam_git.sh

@@ -8,5 +8,5 @@ REMOTE=$(git rev-parse @{u})
 
 if [ $LOCAL != $REMOTE ]; then
     git pull
-    PATH="/usr/local/bin:$PATH" make COQWEB=/srv/coq-www/www all
+    PATH="/usr/local/bin:$PATH" make COQWEB=/var/deploy/coq-www all
 fi