MSVC link emits lots of warnings about missing pdb files

If nothing else, they are annoying when there are real link error related warnings (dup/undefined syms) hidden among so many warnings about missing .pdb.

If this isnt easy to fix, maybe disable this one warning code (LNK4099)?

```console
2019-11-27T02:56:43.6788453Z libpyembed-22b43a942f015ff6.rlib(selectmodule.obj) : warning LNK4099: PDB 'select.pdb' was not found with 'libpyembed-22b43a942f015ff6.rlib(selectmodule.obj)' or at 'D:\pyapp\build\target\x86_64-pc-windows-msvc\debug\deps\select.pdb'; linking object as if no debug info
2019-11-27T02:56:43.6804188Z libpyembed-22b43a942f015ff6.rlib(auto_decoder.obj) : warning LNK4099: PDB 'liblzma.pdb' was not found with 'libpyembed-22b43a942f015ff6.rlib(auto_decoder.obj)' or at 'D:\pyapp\build\target\x86_64-pc-windows-msvc\debug\deps\liblzma.pdb'; linking object as if no debug info
2019-11-27T02:56:43.6805677Z libpyembed-22b43a942f015ff6.rlib(connection.obj) : warning LNK4099: PDB '_sqlite3.pdb' was not found with 'libpyembed-22b43a942f015ff6.rlib(connection.obj)' or at 'D:\pyapp\build\target\x86_64-pc-windows-msvc\debug\deps\_sqlite3.pdb'; linking object as if no debug info
2019-11-27T02:56:43.6817575Z libpyembed-22b43a942f015ff6.rlib(rand_lib.obj) : warning LNK4099: PDB 'ossl_static.pdb' was not found with 'libpyembed-22b43a942f015ff6.rlib(rand_lib.obj)' or at 'D:\pyapp\build\target\x86_64-pc-windows-msvc\debug\deps\ossl_static.pdb'; linking object as if no debug info
2019-11-27T02:56:43.6817748Z libpyembed-22b43a942f015ff6.rlib(_math.obj) : warning LNK4099: PDB 'pythoncore.pdb' was not found with 'libpyembed-22b43a942f015ff6.rlib(_math.obj)' or at 'D:\pyapp\build\target\x86_64-pc-windows-msvc\debug\deps\pythoncore.pdb'; linking object as if no debug info
2019-11-27T02:56:43.6817906Z libpyembed-22b43a942f015ff6.rlib(xmlparse.obj) : warning LNK4099: PDB 'pyexpat.pdb' was not found with 'libpyembed-22b43a942f015ff6.rlib(xmlparse.obj)' or at 'D:\pyapp\build\target\x86_64-pc-windows-msvc\debug\deps\pyexpat.pdb'; linking object as if no debug info
2019-11-27T02:56:43.6818249Z libpyembed-22b43a942f015ff6.rlib(zutil.obj) : warning LNK4099: PDB 'pythoncore.pdb' was not found with 'libpyembed-22b43a942f015ff6.rlib(zutil.obj)' or at 'D:\pyapp\build\target\x86_64-pc-windows-msvc\debug\deps\pythoncore.pdb'; linking object as if no debug info
```

They are included in the win standalone archive, so I guess it might be solvable by adding more paths to the linker.

```bash
> find . -name '*.pdb'
./python/build/core/pythoncore.pdb
./python/build/extensions/_asyncio/_asyncio.pdb
./python/build/extensions/_bz2/_bz2.pdb
./python/build/extensions/_ctypes/_ctypes.pdb
./python/build/extensions/_decimal/_decimal.pdb
./python/build/extensions/_elementtree/_elementtree.pdb
./python/build/extensions/_hashlib/_hashlib.pdb
./python/build/extensions/_lzma/_lzma.pdb
./python/build/extensions/_msi/_msi.pdb
./python/build/extensions/_multiprocessing/_multiprocessing.pdb
./python/build/extensions/_overlapped/_overlapped.pdb
./python/build/extensions/_queue/_queue.pdb
./python/build/extensions/_socket/_socket.pdb
./python/build/extensions/_sqlite3/_sqlite3.pdb
./python/build/extensions/_ssl/_ssl.pdb
./python/build/extensions/pyexpat/pyexpat.pdb
./python/build/extensions/select/select.pdb
./python/build/extensions/unicodedata/unicodedata.pdb
./python/build/extensions/winsound/winsound.pdb
./python/build/lib/liblzma.pdb
./python/build/lib/sqlite3.pdb
```

Start by reproducing the MSVC link from the Windows standalone archive and inspect how the listed PDB files under python/build are supplied to the linker. Done means the missing-PDB LNK4099 warnings are addressed while real duplicate-symbol and undefined-symbol warnings remain visible.

Written by the indexing model from the issue text.