Revert "Revert "Update aosp/master libcxx rebase to r263688""

This reverts commit 1d4a1edbc7.

Change-Id: I2909937fe582f2c5552bc86e7f4d2d5cff0de0aa

test/std/utilities/function.objects/unord.hash/integral.pass.cpp

@@ -21,6 +21,7 @@
 #include <functional>
 #include <cassert>
 #include <type_traits>
+#include <cstddef>
 #include <limits>
 
 template <class T>
@@ -57,4 +58,49 @@ int main()
     test<unsigned long>();
     test<long long>();
     test<unsigned long long>();
+
+//	LWG #2119
+    test<std::ptrdiff_t>();
+    test<size_t>();
+
+	test<int8_t>();
+	test<int16_t>();
+	test<int32_t>();
+	test<int64_t>();
+
+	test<int_fast8_t>();
+	test<int_fast16_t>();
+	test<int_fast32_t>();
+	test<int_fast64_t>();
+
+	test<int_least8_t>();
+	test<int_least16_t>();
+	test<int_least32_t>();
+	test<int_least64_t>();
+
+    test<intmax_t>();
+    test<intptr_t>();
+
+	test<uint8_t>();
+	test<uint16_t>();
+	test<uint32_t>();
+	test<uint64_t>();
+
+	test<uint_fast8_t>();
+	test<uint_fast16_t>();
+	test<uint_fast32_t>();
+	test<uint_fast64_t>();
+
+	test<uint_least8_t>();
+	test<uint_least16_t>();
+	test<uint_least32_t>();
+	test<uint_least64_t>();
+
+    test<uintmax_t>();
+    test<uintptr_t>();
+
+#ifndef _LIBCPP_HAS_NO_INT128
+    test<__int128_t>();
+    test<__uint128_t>();
+#endif
 }