python_cleaner: ignore python-exec in version check

The new python-exec package installs dirs that get caught up in our
version checking logic.  Filter that out.

BUG=chromium:220911
TEST=`./update_chroot` no longer runs python_cleaner

Change-Id: I6fa6539cb8d1a3c98933c6f0939b861a59e616a5
Reviewed-on: https://chromium-review.googlesource.com/180111
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed