Added undefined behavior sanitizer.

Combined common sanitizer flags.
Added fuzzers.

fuzzing/fuzz-BlindedPublicKey.cc

@@ -0,0 +1,23 @@
+
+
+#include <stdint.h>
+#include <stddef.h>
+#include <string>
+
+#include <Blinding.h>
+
+#include "fuzzing.h"
+
+
+bool
+fuzzing_testinput(const uint8_t * data, size_t size)
+{
+	std::string str((const char *) data, size);
+	i2p::data::BlindedPublicKey * bpk;
+
+
+	bpk = new i2p::data::BlindedPublicKey(str);
+	delete bpk;
+
+	return true;
+}