perl: don't install Makefile.old into perl-ptest

We already exclude Makefile, makefile, and makefile.old from copy of the
perl source tree that is used by perl-ptest, but Makefile.old is not
being excluded.  In a rebuild of perl with an existing source tree these
files now exist but have build paths in. As they're backup files, they
can just be excluded from the packages.

Use range globs to clean up the expressions, and exclude Makefile.old.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 30a99aff)
Signed-off-by: Steve Sakoman <steve@sakoman.com>