[COFF] Use std::optional in InputFiles.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sun, 27 Nov 2022 04:54:36 +0000 (20:54 -0800)
committerKazu Hirata <kazu@google.com>
Sun, 27 Nov 2022 04:54:36 +0000 (20:54 -0800)
commitef70f9f12e57b4c6aa4db8a077073f0f0bbc513b
treee61e8de90d05b72146f9fdd898d6c7d2dc6369ee
parentfd8d0b03c9ee2b65d49badd4644ac58e8c80d8be
[COFF] Use std::optional in InputFiles.cpp (NFC)

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
lld/COFF/InputFiles.cpp