Adds a stand-alone executable that serves as an entry point for black
box fuzzing. It reads data from a given file, and then calls into the
same code that the libFuzzer fuzzer targets do.
Fixes: tint:1151
Change-Id: I23f4c5b4aa7040f434c791404136422f5c8ee12a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/63341
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Alastair Donaldson