[compiler-rt] Rename FuzzedDataProvider.h to .hpp and other minor changes.

Summary:
.hpp makes more sense for this header as it's C++ only, plus it
contains the actual implementation.

Reviewers: Dor1s

Reviewed By: Dor1s

Subscribers: kubamracek, dberris, mgorny, delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D65812

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@368054 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed