New failing tests in 0.3.0

While building the 0.3.0 release on the Ubuntu builders, the following errors were observed:

---- test_od::test_od_options_after_filename stdout ----
bin: "/<<PKGBUILDDIR>>/target/debug/coreutils"
write(default): /tmp/.tmpp2J37P/test
run: /<<PKGBUILDDIR>>/target/debug/coreutils od test -v -An -t x2

thread 'test_od::test_od_options_after_filename' panicked at tests/by-util/test_od.rs:945:10:
assertion failed: `(left == right)`

Diff < left / right > :
< 681c bbfd
> 1c68 fdbb
 


note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- test_stat::test_mount_point_basic stdout ----
bin: "/<<PKGBUILDDIR>>/target/debug/coreutils"
run: /<<PKGBUILDDIR>>/target/debug/coreutils stat -c %m /

thread 'test_stat::test_mount_point_basic' panicked at tests/by-util/test_stat.rs:531:5:
Mount point should not be empty

---- test_stat::test_mount_point_combined_with_other_specifiers stdout ----
bin: "/<<PKGBUILDDIR>>/target/debug/coreutils"
run: /<<PKGBUILDDIR>>/target/debug/coreutils stat -c %m %n %s /bin/sh

thread 'test_stat::test_mount_point_combined_with_other_specifiers' panicked at tests/by-util/test_stat.rs:565:5:
Should print mount point, file name, and size


failures:
    test_od::test_od_options_after_filename
    test_stat::test_mount_point_basic
    test_stat::test_mount_point_combined_with_other_specifiers

Build logs can be found for various architectures in https://launchpad.net/ubuntu/+source/rust-coreutils/0.3.0-0ubuntu1

Start with tests/by-util/test_od.rs:945 and tests/by-util/test_stat.rs:531,565, then run the three failing tests against the Ubuntu build. Compare the observed output with the assertions and consult the linked Launchpad build logs for architecture-specific context. Done means the reported od and stat tests pass without regressing their expected output.