def_parser doesn't output some symbols outputted by dumpbin

### Description of the bug:

>cd /d C:/users/kbuilder/_bazel_kbuilder/qm7b2eqz/execroot/_main

C:\Users\kbuilder\_bazel_kbuilder\qm7b2eqz\execroot\_main>dumpbin /SYMBOLS bazel-out/x64_windows-opt/bin/pybind/_objs/_pybind_copy_cc_library/pybind_copy.obj | grep "first_func"
1379 00000000 UNDEF notype () External | ?first_func@@YAHH@Z (int __cdecl first_func(int))
3ECF 00000000 SECT1363 notype External | ??_C@_0L@FOJEACOF@first_func@ (`string')

C:\Users\kbuilder\_bazel_kbuilder\qm7b2eqz\execroot\_main>C:/Users/kbuilder/_bazel_kbuilder/qm7b2eqz/execroot/_main/external/bazel_tools/tools/def_parser/def_parser.exe ../../../../source/repos/pybind_copy.gen.def random_name bazel-out/x64_windows-opt/bin/pybind/_objs/_pybind_copy_cc_library/pybind_copy.obj

C:\Users\kbuilder\_bazel_kbuilder\qm7b2eqz\execroot\_main>cat ../../../../source/repos/pybind_copy.gen.def | grep "first_func"

C:\Users\kbuilder\_bazel_kbuilder\qm7b2eqz\execroot\_main>

### Which category does this issue belong to?

Core

### What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

_No response_

### Which operating system are you running Bazel on?

Windows

### What is the output of `bazel info release`?

_No response_

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

_No response_

### What's the output of `git remote get-url origin; git rev-parse master; git rev-parse HEAD` ?

_No response_

### Is this a regression? If yes, please try to identify the Bazel commit where the bug was introduced.

_No response_

### Have you found anything relevant by searching the web?

_No response_

### Any other information, logs, or outputs that you want to share?

_No response_

Start with the def_parser.exe entry point and reproduce the Windows command using dumpbin /SYMBOLS on pybind_copy.obj. Compare the symbols shown by dumpbin with the generated pybind_copy.gen.def; the work is done when symbols such as first_func are emitted in the .def output.

Written by the indexing model from the issue text.