Revert "[libFuzzer tests] Use substring comparison in libFuzzer tests"

This reverts commit 3592d8049660dcdd07f7c2e797f2de9790f93111.

Breaks the bots, reverting for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309899 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed