[PATCH] ntdll: Avoid the lower 2GB region for large allocations on win64.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=111018

Your paranoid android.


=== debian11 (64 bit WoW report) ===

ntdll:
info.c:1843: Test succeeded inside todo block: Expected to be greater than 2045915136, got 2045915136
info.c:1860: Test succeeded inside todo block: Expected to be greater than 2045915136, got 2045915136