Unexpected behavior on Windows Services for Linux

```
sno@AMANA013:~$ perlbrew list
Use of uninitialized value in localtime at /home/sno/perl5/perlbrew/bin/perlbrew line 1915.
sh: 1: /home/sno/perl5/perlbrew/perls/cperl-5.26.2/bin/perl: not found
substr outside of string at /home/sno/perl5/perlbrew/bin/perlbrew line 1898.
Argument "" isn't numeric in sprintf at /home/sno/perl5/perlbrew/bin/perlbrew line 1898.
substr outside of string at /home/sno/perl5/perlbrew/bin/perlbrew line 1898.
Use of uninitialized value in sprintf at /home/sno/perl5/perlbrew/bin/perlbrew line 1898.
perl-5.26.2 (installed on Mon May 14 13:34:39 2018)
cperl-5.26.2 (0.0.0) (installed on Thu Jan 1 01:00:00 1970)
sno@AMANA013:~$ uname -a
Linux AMANA013 4.4.0-17134-Microsoft #1-Microsoft Tue Apr 10 18:04:00 PST 2018 x86_64 x86_64 x86_64 GNU/Linux
sno@AMANA013:~$ perl -MFile::stat -MData::Dumper -le 'my $executable = "/home/sno/perl5/perlbrew/perls/perl-5.26.2/bin/perl"; print localtime( ( stat $executable )[ 10 ] ); my @s = stat $executable; print Dumper \@s; print localtime 1526297679'
0011070400
$VAR1 = [
bless( [
2,
'48695170971332054',
33261,
2,
1000,
1000,
0,
2033144,
1526297677,
1526297677,
1526297679,
512,
3976
], 'File::stat' )
];

39341314411811331
```

Start by reproducing `perlbrew list` under Windows Services for Linux and inspect the reported paths in `perlbrew` around lines 1898 and 1915. Compare the `stat` and `localtime` values shown in the report; done means the command no longer emits the reported warnings and displays valid installation information.

Written by the indexing model from the issue text.