[lld] [llvm] [lld][MachO] Follow-up to use madvise() for threaded file page-in. (PR #157917)

[John Holdsworth via llvm-commits]

johnno1962 wrote:

The default value for RequiresNullTerminator in the header for MemoryBuffer::getFile(...)  is true when not specified.

https://github.com/llvm/llvm-project/pull/157917