Don't use bashisms in configure
Don't use bashisms in configure

(cherry picked from commit cf61b5441bd6d7232a50f66f28c1b5c6bbdb1570)

reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin,reddcoin-project/reddcoin