symlink is not updating symlinked file control by Test::MockFile about test-mockfile

[drmuey]

hacked (and I do mean hack, lol, because this test will never need a real symlink) around it for now:

use Test::MockFile;
BEGIN {
    *CORE::GLOBAL::symlink = sub {
        my ( $target, $symlink ) = @_; 
        $Test::MockFile::files_being_mocked{$symlink}->{readlink} = $target;
    };  
}

may need to do same w/ readlink() ➜ it was correct but it may have been reading from the file system symlink that symlink() created.

[toddr]

This is redundant to #16