[llvm-exegesis] Program should succeed if benchmark returns StringError.

Summary: Fix for https://bugs.llvm.org/show_bug.cgi?id=37759.

Reviewers: courbet

Subscribers: tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D48004

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334395 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed