These fuzzers are meant to be built and executed inside lode.git's sanitizers
environment (currently enables both asan and ubsan).
online.git can be built the usual way, just the additional `--enable-fuzzers`
flag is needed to build the fuzzers. It is useful to do this in a separate
build tree, since the fuzzers config doesn't produce a `loolwsd` binary.
Run the fuzzers like this:
- Admin:
----
./admin_fuzzer -max_len=16384 fuzzer/admin-data/
----
- ClientSession:
----
./clientsession_fuzzer -max_len=16384 fuzzer/data/
----
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