[LTO] Remove extraneous ArrayRef (NFC) (llvm#90306)

We don't need to explicitly create these instances of ArrayRef because
Hasher::update takes ArrayRef, and ArrayRef can be implicitly
constructed from C arrays.

Author: kazutakahirata

llvm/lib/LTO/LTO.cpp

@@ -114,12 +114,12 @@ void llvm::computeLTOCacheKey(
   auto AddUnsigned = [&](unsigned I) {
     uint8_t Data[4];
     support::endian::write32le(Data, I);
-    Hasher.update(ArrayRef<uint8_t>{Data, 4});
+    Hasher.update(Data);
   };
   auto AddUint64 = [&](uint64_t I) {
     uint8_t Data[8];
     support::endian::write64le(Data, I);
-    Hasher.update(ArrayRef<uint8_t>{Data, 8});
+    Hasher.update(Data);
   };
   AddString(Conf.CPU);
   // FIXME: Hash more of Options. For now all clients initialize Options from