pseudo: Add support for ignoring paths from the pseudo DB
Add PSEUDO_IGNORE_PATHS, a comma separated list of path prefixes, where
any files underneath are not handled by pseudo. This allows files to
be left out of the pseudo datanase where we know we don't need the
fake root emulation. This is particularly useful if we know these files
can be deleted outside of pseudo context.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
