Disable some IR death tests when SEH is available

They hang for me locally. I suspect that there is a use-after-free when
attempting to destroy an LLVMContext after asserting from the middle of
metadata tracking. It doesn't seem worth debugging it further.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310660 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed