Add Elixir start scripts so "bin/ejabberdctl iexdebug" works

ecs/Dockerfile

@@ -28,6 +28,8 @@ RUN mkdir runtime \
     && rm -rf releases erts* bin/*src bin/dialyzer bin/typer \
     && rm bin/ejabberd bin/ejabberd.bat \
     && mkdir lib/ejabberd-$EJABBERD_VERSION/priv/bin \
+    && cp /usr/lib/elixir/bin/* bin/ \
+    && sed -i 's|ERL_EXEC="erl"|ERL_EXEC="/home/ejabberd/bin/erl"|' bin/elixir \
     && cp /ejabberd/tools/captcha*sh lib/ejabberd-$EJABBERD_VERSION/priv/bin \
     && cp -r /ejabberd/sql lib/ejabberd-*/priv
 

ecs/bin/ejabberdctl

@@ -332,7 +332,7 @@ case $1 in
         ;;
     iexdebug)
         debugwarning
-        exec_iex "$(uid debug)" --remsh "$ERLANG_NODE"
+        exec_iex "$(uid debug)" --remsh "$ERLANG_NODE" --boot start_clean
         ;;
     iexlive)
         livewarning