bug#13516: tests/rm/unread3 fails on Mac OS X 10.8

[Paul Eggert]

Thanks, to help debug that can you please try the following
shell commands?  The idea is to run the newly-built "rm" in
a directory that is not readable.

cd coreutils-8.20/src
D=$(pwd)
mkdir -p a/1 b c d/2 e/3
cd c
chmod u=x,go= .
ktrace -o /tmp/tr $D/rm -r $D/a $D/b
kdump /tmp/tr

The "ktrace" should get a trace of the system calls executed
by the failing "rm", and the "kdump" should generate a printable
output of that.