Summary: Use -fsanitize-recover instead of -mllvm -msan-keep-going: pass -fsanitize-recover value to msan.

Reviewers: eugenis

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D26354

Patch by Aleksey Shlyapnikov.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@286148 91177308-0d34-0410-b5e6-96231b3b80d8