[lld][ELF] rename to add new support in the ELF Writer

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@176424 91177308-0d34-0410-b5e6-96231b3b80d8
[lld][ELF] Add modified writer

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@176425 91177308-0d34-0410-b5e6-96231b3b80d8