[Bug driver/97574] Allow for nul output with Windows

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97574

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think "nul" should work, but it looks like the error is in the linker,
ld.exe, not GCC.