SuccessChanges

Summary

  1. gn build: restore tablegen restat optimization after r373664 (details)
Commit 5ff60e160aed21c346d83c96581a28a8222e3da9 by nicolasweber
gn build: restore tablegen restat optimization after r373664
llvm-svn: 374395
The file was modifiedllvm/utils/gn/secondary/llvm/utils/TableGen/tablegen.gni