UTF-8 *default-external-format* in build and start scripts

Hello.

Thanks for Lisp on OpenShift :)

I needed to set <code>sb-impl::*default-external-format*</code> to UTF-8 in the build and start script in order for system :rfc2388 to load and be able to start the app.

Otherwise :ANSI_X3.4-1968 will remain and loading of that system will fail, as the author's name is not ASCII friendly.

Thanks again.
José Santos