[PATCH] [ELF] Simplify adding default atoms

[Rui Ueyama]

Thank you for doing this. This is a nice cleanup. LGTM.


REPOSITORY
  rL LLVM

================
Comment at: lib/ReaderWriter/ELF/DynamicLibraryWriter.h:64
@@ +63,3 @@
+  auto file = llvm::make_unique<RuntimeFile<ELFT>>(this->_ctx, "C runtime");
+  file->addAbsoluteAtom("_end");
+  result.push_back(std::move(file));
----------------
addAbsoluteAtom returns a pointer to a new atom, so we discard the pointer here. Looks like we don't use return values from the function at all. This doesn't have to be done in this patch, but we should make the function return void.

http://reviews.llvm.org/D8852

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