[LTO] Add stats-file option to LTO/Config.h.

This patch adds a StatsFile option to LTO/Config.h and updates both
LLVMGold and llvm-lto2 to set it.

Reviewers: MatzeB, tejohnson, espindola

Reviewed By: tejohnson

Differential Revision: https://reviews.llvm.org/D45531


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330411 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed