Updated for new

hash function interface.

Rev: src/nettle/testsuite/md5-test.m4:1.3
Rev: src/nettle/testsuite/sha1-test.m4:1.3
Rev: src/nettle/testsuite/sha256-test.m4:1.2
Rev: src/nettle/testsuite/yarrow-test.c:1.10