Admin/build_release

updated to Cygwin 3.0.4 (approximation for Isabelle2019);

#!/usr/bin/env bash
#
# DESCRIPTION: build full Isabelle distribution from repository

THIS="$(cd "$(dirname "$0")"; pwd)"

"$THIS/build" jars || exit $?
exec "$THIS/../bin/isabelle_java" isabelle.Build_Release "$@"