[LLDB][SystemZ] Pass HWCAP flags to ifunc resolver

[uweigand]

The debugger sometimes executes calls to an ifunc resolver routine in the target. On SystemZ, our ABI specifies that such resolver routines get passed a single argument of type unsigned long providing the value of the AT_HWCAP flags. This is not currently done by LLDB (see Process::ResolveIndirectFunction).

[llvmbot]

@llvm/issue-subscribers-lldb

Author: Ulrich Weigand (uweigand)

The debugger sometimes executes calls to an ifunc resolver routine in the target. On SystemZ, our ABI specifies that such resolver routines get passed a single argument of type `unsigned long` providing the value of the `AT_HWCAP` flags. This is not currently done by LLDB (see `Process::ResolveIndirectFunction`).