Tests for GetLongPathName

[Paul Vriens]

Hi Alexandre,

Several file related functions have a maximum path size of 32767 when 
using a "\\?\" prefix. Testing these large paths only works on Windows 
due to Linux having a maximum path limit of 4096.

Does it still make sense to add these tests or should I focus on <= 
4096? I guess if we/Wine have a limit due to the OS we are running on we 
should probably act the same as that higher limit on Windows?

-- 
Cheers,

Paul.