[gn build] Add build files for lib/LTO, lib/Linker, lib/Passes, lib/Transforms/{IPO,Instrumentation,ObjCARC}

Differential Revision: https://reviews.llvm.org/D55553


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@348905 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed