Log Message:
brlaser: update to 6.2.7. Changes:

New printer entries:
- Brother DCP-7010
- Brother DCP-B7500D series
- Brother DCP-L2560DW series
- Brother HL-2240 series
- Brother HL-2260D
- Brother HL-5140 series
- Brother HL-5370DW series
- Brother HL-5450DN series
- Brother HL-L2402D
- Brother MFC-8440
- Brother MFC-L2690DW
- Brother HL-L2400DW
- Brother HL-L2405W

Added printer entries for "Test Drivers".

Code Changes:
- Correct PCFileName for DocuPrint P265 dw
- Replaced `Duplex normal` with `Duplex rotated`
- Both Duplex & Tumble use PLC `&l2S`

Issues Resolved:
- Incorrect Duplex & Tumble Check Statement
- Duplex long-edge actually prints duplex short-edge
- All reverse sides are unreadable with artefactsbug (duplex long-edge)