Even for EABI, NetBSD uses DWARF EH, not EHABI. This change matches the Clang frontend behavior, and fixes link errors caused by incorrect references to `__cxa_end_cleanup` rather than `_Unwind_Resume`. With this change and #143055, I was able to run [zig-bootstrap](https://github.com/ziglang/zig-bootstrap) to completion for `arm-netbsd10.1-eabihf`.