[MIPS] Use nacl_atomic_is_lock_free instead of c11_atomic_is_lock_free

include/atomic

 // -*- C++ -*-
 //===--------------------------- atomic -----------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
@@ skipping 800 matching lines @@
 // general atomic<T>
 
 template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value>
 struct __atomic_base  // false
 {
     mutable _Atomic(_Tp) __a_;
 
   // @LOCALMOD-BEGIN The NaCl builtin delays resolution of the lock-free
   //                 property until translation time (time at which the
   //                 actual target is known).
-#if defined (__pnacl__)
+#if defined (__pnacl__) || (defined(__mips__) && defined (__native_client__))
     _LIBCPP_INLINE_VISIBILITY
     bool is_lock_free() const volatile _NOEXCEPT
         {return __nacl_atomic_is_lock_free(sizeof(_Tp), &__a_);}
     _LIBCPP_INLINE_VISIBILITY
     bool is_lock_free() const _NOEXCEPT
         {return __nacl_atomic_is_lock_free(sizeof(_Tp), &__a_);}
 #else
     _LIBCPP_INLINE_VISIBILITY
     bool is_lock_free() const volatile _NOEXCEPT
         {return __c11_atomic_is_lock_free(sizeof(_Tp));}
@@ skipping 959 matching lines @@
 #define ATOMIC_LLONG_LOCK_FREE     __GCC_ATOMIC_LLONG_LOCK_FREE
 #define ATOMIC_POINTER_LOCK_FREE   __GCC_ATOMIC_POINTER_LOCK_FREE
 
 #endif  //  !__has_feature(cxx_atomic)
 
 _LIBCPP_END_NAMESPACE_STD
 
 #endif  // !_LIBCPP_HAS_NO_THREADS
 
 #endif  // _LIBCPP_ATOMIC