Invalid DWARF emitted by Zig on macOS 13

[kubkon]

Updating for writergate in #181 revealed a weird issue with what seems like malformed DWARF output by the Zig compiler but only on macOS 13 (newer releases of macOS behave as expected).

As you can see below, the compile unit header is parsed as .{ .length = 0, .dw_fmt = dwarf32, .version = 0 } which points at malformed DWARF. Example error collected from GitHub's CI run:

test
+- test-system-tools
   +- test-macho-reexports-zig
      +- exec
         +- cc (main) failure
debug: TODO unimplemented -demangle option
debug: TODO unimplemented -lto_library /Applications/Xcode_15.2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libLTO.dylib option
warning: /Users/runner/.cache/zig/o/bee416279e7c6025c3f8e993674c7644/liba.a(a.o): object file was built for newer platform version: expected 13.0.0, got 13.7.6
error: /Users/runner/.cache/zig/o/bee416279e7c6025c3f8e993674c7644/liba.a(a.o): unhandled DWARF version: 0
    note: parsed DWARF header: { .length = 0, .dw_fmt = dwarf32, .version = 0 }
error: /Users/runner/.cache/zig/o/bee416279e7c6025c3f8e993674c7644/liba.a(a.o): unexpected error when parsing DWARF info: InvalidVersion
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: the following command exited with error code 1:
cc -fno-lto -O0 -o /Users/runner/.cache/zig/o/2ad3e5c1410c951d33fae181f990a52f/main -B/Users/runner/.cache/zig/o/9eff5976869c7e76effa6a740d146400 /Users/runner/.cache/zig/o/bca150cca5148c82e0b7a328c4cac7de/main.o /Users/runner/.cache/zig/o/bee416279e7c6025c3f8e993674c7644/liba.a