Log Message:
pkgtools/pkgchkxx: Update to 0.3.2

* Fix an issue where `pkgrrxx` (and possibly `pkgchkxx` also) leaks file
  descriptors and eventually die. This only happened on platforms where
  `posix_spawn(3)` was missing but `vfork(2)` was available. The bug was
  introduced at version 0.2.5. Reported by @bsiegert [#11].
* Fix an issue where a progress bar shown by `pkgrrxx -u` flashes rapidly
  when there are many packages to update.