Don't link with the archive library programs that don't use it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184081 91177308-0d34-0410-b5e6-96231b3b80d8
Move lib/Archive to tools/llvm-ar.

llvm-ar is the only tool that needs to write archive files. Every other tool
should be able to use the lib/Object interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184083 91177308-0d34-0410-b5e6-96231b3b80d8