Acoording to what the spec says about the number of sybols [1]:
"This value should be zero for an image because COFF debugging
information is deprecated."
Changing as if not zero it causes problems to llvm-objcopy. This
affects only the architectures where COFF is not supported by objcopy
and where we build the PE header via assembly code.
[1] https://docs.microsoft.com/en-us/windows/win32/debug/pe-format
