LLVM fails to build on 32-bit macOS

[MarcusCalhoun-Lopez]

LLVM fails to build on 32-bit macOS with error:

error: no matching function for call to 'min'
                std::min(HashReadEnd - CurrHashReadPosition,
                ^~~~~~~~
note: candidate template ignored: deduced conflicting types for parameter '_Tp' ('int' vs. 'long')
 min(const _Tp& __a, const _Tp& __b) 

The issues seems to be the use of ssize_t at

llvm-project/llvm/lib/ObjCopy/MachO/MachOWriter.cpp

Line 524 in 3c14836

static_cast<ssize_t>(CodeSignature.BlockSize)));

If ssize_t is replaced with std::ptrdiff_t, the build works on both 32-bit and 64-bit systems.