[llvm] [InferAttrs] Mark errnomem-setting libcalls as such (PR #124742)

[Antonio Frighetto via llvm-commits]

================
@@ -695,6 +759,7 @@ bool llvm::inferNonMandatoryLibFuncAttrs(Function &F,
     Changed |= setDoesNotThrow(F);
     Changed |= setDoesNotCapture(F, 0);
     Changed |= setOnlyReadsMemory(F, 0);
+    Changed |= setOnlyAccessesArgMemOrErrnoMem(F, ModRefInfo::Ref);
----------------
antoniofrighetto wrote:

Right, this is being added as inaccessiblemem: read as it only reads the filesystem.

https://github.com/llvm/llvm-project/pull/124742