VMS perl: Fix glob output

In some cases, perl's glob() thinks it needs to return file names with
generation numbers, such as when a file name pattern includes two
periods.  Constructing other file names by simple appending to file
names with generation numbers isn't a good idea, so for the VMS case,
just peal the generation numbers if they are there.
Fortunately, this is easy, as the returned generation number delimiter
will always be a semi-colon.

Reviewed-by: Rich Salz <rsalz@openssl.org>