* Added .podspec file for libFuzzer
* The libFuzzer pod does not include the `main()` function to allow
the pod to be built independently.
* Fuzzing applications must provide both the `main()` function and
the `LLVMFuzzerTestOneInput` function. The `main()` function should
call `fuzzer::FuzzerDriver(...)` similar to the original `FuzzerMain.cpp`.
* LLVM License and authors
