Poudriere build fails on several ports with leftovers message for info/dir

[Yuri]

This seems to be the serial error related to turned off docs.

/etc/make.conf has these unsets:
OPTIONS_UNSET=DOCS HTMLDOCS HELP PORTDOCS APIDOCS RDOC MANPAGES EXAMPLES 
PORTEXAMPLES

Here is the message:
====>> Error: Files or directories left over:
info/dir

Example ports:
security/libassuan
security/libgcrypt
security/libksba

poudriere is run with -t of course

Yuri