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

This reverts commit 1d4a1edbc7.

Change-Id: I2909937fe582f2c5552bc86e7f4d2d5cff0de0aa

test/std/utilities/function.objects/refwrap/refwrap.const/type_ctor.fail.cpp

@@ -13,6 +13,8 @@
 
 // reference_wrapper(T&&) = delete;
 
+// XFAIL: c++98, c++03
+
 #include <functional>
 #include <cassert>
 

test/std/utilities/function.objects/refwrap/refwrap.helpers/ref_1.fail.cpp

@@ -15,6 +15,8 @@
 
 // Don't allow binding to a temp
 
+// XFAIL: c++98, c++03
+
 #include <functional>
 
 struct A {};

test/std/utilities/function.objects/refwrap/type_properties.pass.cpp

@@ -14,6 +14,9 @@
 // Test that reference wrapper meets the requirements of TriviallyCopyable,
 // CopyConstructible and CopyAssignable.
 
+// Test fails due to use of is_trivially_* trait.
+// XFAIL: gcc-4.9
+
 #include <functional>
 #include <type_traits>
 #include <string>