Amend pod_lib.pl to work with miniperl (no dynamic loading)

This is to allow cross-compilation builds to run installperl using a
host miniperl instead of the built Perl binary.
config.ce: Use ~cc~, not ~CC~

This was preventing several things from working properly,
like Errno_pm.PL, which tried to use $Config{cppstdin},
which was not set properly.