[DejaVu-fonts] patch to generate correct fsSelection

[Roozbeh P. <ro...@fa...>]

Apparently the value of fsSelection in the OS/2 table is not set
properly for Light fonts. FontForge sets the Regular bit, while it
shouldn't, according to the spec:

http://www.microsoft.com/typography/otspec/os2.htm#fss

Attaching a patch.

Roozbeh