Reorganize directories (#3462)

* 🚚 move files
* 🚚 rename doc folder to docs
* 🚚 rename test folder to tests

tests/thirdparty/Fuzzer/test/NthRunCrashTest.cpp

@@ -0,0 +1,18 @@
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+
+// Crash on the N-th execution.
+#include <cstdint>
+#include <cstddef>
+#include <iostream>
+
+static int Counter;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (Counter++ == 1000) {
+    std::cout << "BINGO; Found the target, exiting\n";
+    exit(1);
+  }
+  return 0;
+}
+