Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/dynarmic/tests/rand_int.h

@@ -0,0 +1,27 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2020 MerryMage
+ * SPDX-License-Identifier: 0BSD
+ */
+
+#pragma once
+
+#include <random>
+#include <type_traits>
+
+namespace detail {
+inline std::mt19937 g_rand_int_generator = [] {
+    std::random_device rd;
+    std::mt19937 mt{rd()};
+    return mt;
+}();
+}  // namespace detail
+
+template<typename T>
+T RandInt(T min, T max) {
+    static_assert(std::is_integral_v<T>, "T must be an integral type.");
+    static_assert(!std::is_same_v<T, signed char> && !std::is_same_v<T, unsigned char>,
+                  "Using char with uniform_int_distribution is undefined behavior.");
+
+    std::uniform_int_distribution<T> rand(min, max);
+    return rand(detail::g_rand_int_generator);
+}