fuzz: add a LLVMFuzzerInitialize() to all fuzzers

To compile the AFL binaries, we need every fuzzer to have a consistent
set of functions. Some fuzzers require the initialize function, so all
the rest must have an empty one.

AFL binaires are handy for testing the fuzz results in a less magical
environment than libfuzzer/honggfuzz give you.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>

lib/fuzzing/fuzz_ndr_X.c

@@ -329,3 +329,9 @@ int LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
 
 	return 0;
 }
+
+
+int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+	return 0;
+}