[PATCH v3] ntdll/tests: Do not write to fs, gs when testing cleared segment regs on x64.

[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=92995

Your paranoid android.


=== debiant2 (64 bit WoW report) ===

ntdll:
exception.c:3723: Test succeeded inside todo block: UnhandledExceptionFilter wasn't called
exception.c:3723: Test succeeded inside todo block: UnhandledExceptionFilter wasn't called
exception.c:3723: Test succeeded inside todo block: UnhandledExceptionFilter wasn't called
exception.c:3723: Test succeeded inside todo block: UnhandledExceptionFilter wasn't called
exception.c:3723: Test succeeded inside todo block: UnhandledExceptionFilter wasn't called
exception.c:3723: Test succeeded inside todo block: UnhandledExceptionFilter wasn't called

Report validation errors:
ntdll:exception has unaccounted for failure messages
ntdll:exception returned success despite having failures