Rename allocateString -> allocate.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@195284 91177308-0d34-0410-b5e6-96231b3b80d8
[PECOFF] Do not check if library is already added.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@195289 91177308-0d34-0410-b5e6-96231b3b80d8