Add implementation for the murmur3 x64_128 hash

tests/hasher/test_hasher.h

@@ -0,0 +1,11 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#ifndef TEST_HASHER_H
+#define TEST_HASHER_H
+
+#include "wapp.h"
+
+// Test Murmur3 hash implementation against the reference implementation
+WpTestFuncResult test_murmur3(void);
+
+#endif // !TEST_HASHER_H