Fix build for LLVM >= r74640 Some LLVM objects now take a 'Context' to make multi-threaded apps easier. Since we're not multi-threaded it's safe to use llvm::getGlobalContext() which gives us the same behavior as we had before.

struct S
{
    int func()
    {
        return 42;
    }
}

void main()
{
    S s;
    int i = s.func();
}