Bug #94518 for Portable: Portable-1.18 doesn't work well with File::Spec from 5.9.10

Can be demonstrated by this code which returns wrong (non relocated) values:

use File::Spec;
use Config;
print "privlibexp=$Config{privlibexp}\n";
print "perlpath=$Config{perlpath}\n";

After removing `use File::Spec;` it works as expected.

Portable-1.20 implements ugly hack - see Portable::FileSpec  (Win32 ONLY!!!)

Should be fixed in a better way.

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kmx