package/perl-db-file: Berkeley DB 1.85 compatibility API is not needed

This package is also compatible with Berkeley DB v2 or higher:
https://metacpan.org/source/PMQS/DB_File-1.835/Changes



1.50
    DB_File can now build with either DB 1.x or 2.x, but not both at
    the same time.

[Thomas: adjust Config.in help text accordingly.]

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>