Fix enough code to get make test_prep working with -dDusedefaultstrict

Fix enough code to get make test_prep working with -dDusedefaultstrict

This change fixes enough code that it's possible to run make test_prep when perl is compiled with -Dusedefaultstrict.

There are 2 caveats to this:

 - Does not address XSLoader/DynaLoader already submitted in another PR.
 - Does not address cpan/Pod-Usage or cpan/Text-Tabs which continue to be outstanding upstream.