[libc++] Use numeric_limits instead of raw INT_MAX

[ldionne]

Summary

This allows discard_block_engine to work on platforms that might not
provide a full <limits.h> header.

[ldionne]

Fix CI

[ldionne]

Disable static_assert in C++03.

libcxx/include/__random/discard_block_engine.h

 //===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef _LIBCPP___RANDOM_DISCARD_BLOCK_ENGINE_H
 #define _LIBCPP___RANDOM_DISCARD_BLOCK_ENGINE_H
 
 #include <__config>
 #include <__random/is_seed_sequence.h>
 #include <__utility/move.h>
-#include <climits>
 #include <iosfwd>
+#include <limits>
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
 
 _LIBCPP_PUSH_MACROS
 #include <__undef_macros>
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template<class _Engine, size_t __p, size_t __r>
 class _LIBCPP_TEMPLATE_VIS discard_block_engine
 {
     _Engine __e_;
     int     __n_;
 
     static_assert(  0 <  __r, "discard_block_engine invalid parameters");
     static_assert(__r <= __p, "discard_block_engine invalid parameters");
-    static_assert(__r <= INT_MAX, "discard_block_engine invalid parameters");
+    static_assert(__r <= numeric_limits<int>::max(), "discard_block_engine invalid parameters");
 public:
     // types
     typedef typename _Engine::result_type result_type;
 
     // engine characteristics
     static _LIBCPP_CONSTEXPR const size_t block_size = __p;
     static _LIBCPP_CONSTEXPR const size_t used_block = __r;