Fix options to allow --warn-exit in eol-branch.sh

The --warn-exit option was recently added except that the getopt
parsing wasn't appropriately updated and thus rejected the flags.

The flag also doesn't take a positional argument, so fix the argument
shifting.

Change-Id: I9671f79a969a7e5f9aaff9edaf235406d77b2da8

eol_branch.sh

@@ -22,7 +22,7 @@ function print_help {
     echo ""
 }
 
-OPTS=`getopt -o dhq --long eol-message:,dry,help,quiet,remote: -n $0 -- "$@"`
+OPTS=`getopt -o dhqw --long eol-message:,dry,help,quiet,remote:,warn-exit -n $0 -- "$@"`
 if [ $? != 0 ] ; then
     echo "Failed parsing options." >&2
     print_help
@@ -64,7 +64,6 @@ while true; do
         -w|--warn-exit)
             WARN_EXIT=true
             shift
-            shift
             ;;
         --)
             shift