ntdll/tests: Fix exception test failures 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=7354

Your paranoid android.


=== w2000pro (32 bit exception) ===
exception.c:406: Test failed: 42: Wrong exception address 00950000/00950001
exception: unhandled exception 80000004 at 00950000
exception.c:406: Test failed: 42: Wrong exception address 7C5C20B0/00950001

=== wxppro (32 bit exception) ===
exception.c:406: Test failed: 42: Wrong exception address 00A30000/00A30001
exception: unhandled exception 80000004 at 00A30000
exception.c:406: Test failed: 42: Wrong exception address 7C80DF3C/00A30001

=== wvistau64 (32 bit exception) ===
exception.c:406: Test failed: 42: Wrong exception address 003D0000/003D0001
exception: unhandled exception 80000004 at 003D0000
exception.c:406: Test failed: 42: Wrong exception address 7751ED97/003D0001

=== w2008s64 (32 bit exception) ===
exception.c:406: Test failed: 42: Wrong exception address 003C0000/003C0001
exception: unhandled exception 80000004 at 003C0000
exception.c:406: Test failed: 42: Wrong exception address 77E5ED97/003C0001

=== w7u (32 bit exception) ===
exception.c:406: Test failed: 42: Wrong exception address 003C0000/003C0001
exception: unhandled exception 80000004 at 003C0000
exception.c:406: Test failed: 42: Wrong exception address 77CDE34F/003C0001

=== w8 (32 bit exception) ===
exception.c:406: Test failed: 42: Wrong exception address 00290000/00290001
exception: unhandled exception 80000004 at 00290000
exception.c:406: Test failed: 42: Wrong exception address 77174D17/00290001