This reverts a change of commit b3598cf2a355497693bb66097edc156af3152e9b .
On Windows on ARM64 with LLVM the "NM" tool is called with a parameter like so:
```
  RbConfig::CONFIG["NM"] # => "llvm-nm --no-llvm-bc"
```

Therefore the command must be called with a shell string.

The combination of mingw tools and cygin/msys2 ruby leaves CRs.

Windows 11 SDK Version 10.0.26100.0 introduced a new internal inline
function in ucrt/corecrt_math.h.  Even it appears in object files and
will be included in the DEF file, it will be removed from the DLL and
result in a linker error.

Prefix underscore is already removed here.

Suddenly it began to add `_ucrt_int_to_float` by the recent version.

This reverts commit 63ae1e3cb5d302e5229143c00152328166d26780.

	[Bug #21255] Win32: Do not export `__declspec(selectany)` symbols

	```
	x64-vcruntime140-ruby350.def : error LNK2001: unresolved external symbol Avx2WmemEnabledWeakValue
	```

	Win: Suppress false warnings from Visual C 17.14.1

	https://developercommunity.visualstudio.com/t/warning-C5287:-operands-are-different-e/10877942?

	It is not able to silence "operands are different enum types"
	warnings, even using an explicit cast, as the message says.