libc++: fix the traps numeric_limits test

test/language.support/support.limits/limits/numeric.limits.members/traps.pass.cpp

 //===----------------------------------------------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is dual licensed under the MIT and the University of Illinois Open
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 // test numeric_limits
 
 // traps
 
 #include <limits>
 
-#if (defined(__i386__) || defined(__x86_64__))
+#if (defined(__i386__) || defined(__x86_64__)) || defined(__pnacl__) // @LOCALMOD
 static const bool integral_types_trap = true;
 #else
 static const bool integral_types_trap = false;
 #endif
 
 template <class T, bool expected>
 void
 test()
 {
     static_assert(std::numeric_limits<T>::traps == expected, "traps test 1");
@@ skipping 22 matching lines @@
     test<long long, integral_types_trap>();
     test<unsigned long long, integral_types_trap>();
 #ifndef _LIBCPP_HAS_NO_INT128
     test<__int128_t, integral_types_trap>();
     test<__uint128_t, integral_types_trap>();
 #endif
     test<float, false>();
     test<double, false>();
     test<long double, false>();
 }