[v2] ntdll: Fix and test exception codes on x86-64.

[Marvin]

Hi,

While running your changed tests on Windows, 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=26726

Your paranoid android.


=== wvistau64 (32 bit exception) ===
exception.c:594: Test failed: 42: Unexpected eip 0x340000/0x340001
exception: unhandled exception 80000004 at 00340000
exception.c:594: Test failed: 42: Unexpected eip 0x77baed97/0x340001

=== w7u (32 bit exception) ===
exception.c:594: Test failed: 42: Unexpected eip 0x710000/0x710001
exception: unhandled exception 80000004 at 00710000
exception.c:594: Test failed: 42: Unexpected eip 0x77cde34f/0x710001

=== w1064 (32 bit exception) ===
An error occurred while waiting for the test to complete: network read timed out (wait2/connect:AgentVersion.h:0/9)
The test VM has crashed, rebooted or lost connectivity (or the TestAgent server died)

=== wvistau64 (64 bit exception) ===
exception.c:2227: Test failed: 36: Unexpected eip 0x260000/0x260001
exception: unhandled exception 80000004 at 0000000000260000

=== w1064 (64 bit exception) ===
An error occurred while waiting for the test to complete: network read timed out (wait2/connect:AgentVersion.h:0/9)
The test VM has crashed, rebooted or lost connectivity (or the TestAgent server died)