Add support for -fno-builtin to LTO and ThinLTO to libLTO

Reviewers: tejohnson, pcc

Subscribers: Prazek, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D30791

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298936 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed