[Frontend][PCH]-Add support for ignoring PCH options (-ignore-pch).#142409

MaggieYingYi merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

MaggieYingYi:yingyi/main/PCHMaggieYingYi/llvm-project:yingyi/main/PCHCopy head branch name to clipboard