Moving libFuzzer from LLVM to compiler-rt.

This change only removes libFuzzer tests and CMake machinery,
the source copy temporarily remains at the old location.

Differential Revision: https://reviews.llvm.org/D36980

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311405 91177308-0d34-0410-b5e6-96231b3b80d8
152 files changed