Add template_dir= to bash completion

priv/shell-completion/bash/rebar

@@ -12,8 +12,8 @@ _rebar()
         create create-app create-node doc delete-deps eunit \
         get-deps generate help int_test perf_test test \
         version xref \
-        case= force=1 jobs= suite= verbose=1 appid= template= \
-        skip_deps=1"
+        case= force=1 jobs= suite= verbose=1 appid= skip_deps=1 \
+        template= template_dir="
 
     if [[ ${cur} == --* ]] ; then
         COMPREPLY=( $(compgen -W "${lopts}" -- ${cur}) )