CHROMIUM: locks: add debugging on failures

We're seeing random permission failures here.  Lets add a bit
of debugging logic to try and figure out what's going wrong.

BUG=chromium:891528
TEST=emerging with forced failure includes debug output

Change-Id: I250654ce5b52c5af33454cd2dc9941d38134a6de
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/portage_tool/+/2311564
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed