sbin/md5: fix test case to not write outside temp directory

The bsd-p-test did create files 1.out .. 8.out in the test directory.
This has been fixed and the temporary output files are now written
to the temporary directory.

MFC after:	3 days

sbin/md5/tests/bsd-p-test.SH

@@ -8,9 +8,9 @@ testloop () {
 
 	for algorithm in sha512; do
 		for f in %%TESTSBASE%%/sbin/md5/*.inp; do
-			outbase=%%TESTSBASE%%/sbin/md5/$(basename $f .inp)
+			outbase=$(basename $f .inp)
 			$algorithm$sum $opt -p < $f > $outbase.out
-			diff $outbase.$algorithm$sum-p.chk $outbase.out || exitcode=1
+			diff %%TESTSBASE%%/sbin/md5/$outbase.$algorithm$sum-p.chk $outbase.out || exitcode=1
 		done
 	done
 }