use /dev/urandom for truncate/00.t tests (Sage Weil)

Author: szaka

tests/truncate/00.t

@@ -22,7 +22,7 @@ expect 0 truncate ${n0} 567
 expect 567 lstat ${n0} size
 expect 0 unlink ${n0}
 
-dd if=/dev/random of=${n0} bs=12345 count=1 >/dev/null 2>&1
+dd if=/dev/urandom of=${n0} bs=12345 count=1 >/dev/null 2>&1
 expect 0 truncate ${n0} 23456
 expect 23456 lstat ${n0} size
 expect 0 truncate ${n0} 1