Fix XFAILS for is_trivially_destructible trait

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@289802 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/utilities/tuple/tuple.tuple/tuple.cnstr/dtor.pass.cpp

@@ -9,9 +9,6 @@
 
 // UNSUPPORTED: c++98, c++03
 
-// Doesn't pass due to use of is_trivially_* trait.
-// XFAIL: gcc-4.9
-
 // <tuple>
 
 // template <class... Types> class tuple;

test/std/utilities/utility/pairs/pairs.pair/dtor.pass.cpp

@@ -9,9 +9,6 @@
 
 // UNSUPPORTED: c++98, c++03
 
-// Doesn't pass due to use of is_trivially_* trait.
-// XFAIL: gcc-4.9
-
 // <utility>
 
 // template <class T1, class T2> struct pair