Remove debugging code (linux-x86-64-clang-debug was giving warnings)

Conflicts:
	src/mongodb_fmt_plug.c
	src/rawBLAKE2_512_fmt_plug.c
Fix warnings when building linux-x86-64-clang-debug target
(Ab)use bench_running variable for keeping opencl_process_event() from
processing events while self-test is running. Otherwise a slow self-test in
combination with a short Save interval will thrash the .rec file during
start of a resumed session.