Add common useless serials and compare in lowercase to catch differently cased versions

[JuanIrache]

Addresses #12

[chetbox]

On the 120 machines of our users we have seen all of these serial numbers come up but no others that are worth adding. We have seen uppercase/lowercase variations of some too so that case insensitive check is very helpful.

I think this is a really worthwhile improvement. @es128 can we get this merged and published?

[chetbox]

I've just spotted that Coreboot on a StarLabs Mk IV (My dev machine!) returns a serial number of 123456789. Is it worth adding that to the list?

Edit: Although the UUID is not very useful either!

System Information
        Manufacturer: Star Labs
        Product Name: LabTop
        Version: 1.0
        Serial Number: 123456789
        UUID: Not Settable

[JuanIrache]

Two more serial numbers reported by multiple machines:
03000200-0400-0500-0006-000700080009
FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF