* include/std/std_limits.h (__glibcpp_f32_infinity_bytes,
        __glibcpp_f32_has_infinity, __glibcpp_f64_infinity_bytes,
        __glibcpp_f64_has_infinity, __glibcpp_f80_infinity_bytes,
        __glibcpp_f80_has_infinity, __glibcpp_f96_infinity_bytes,
        __glibcpp_f96_has_infinity, __glibcpp_f128_infinity_bytes,
        __glibcpp_f128_has_infinity, __glibcpp_float_infinity_bytes,
        __glibcpp_float_has_infinity, __glibcpp_double_infinity_bytes,
        __glibcpp_double_has_infinity, __glibcpp_long_double_infinity_bytes,
        __glibcpp_long_double_has_infinity): Remove.
        (std::numeric_limits<float>, std::numeric_limits<double>,
        std::numeric_limits<long double>): Use __builtin_huge_val
        to implement has_infinity and infinity().
        * src/limits.cc (__glibcpp_float_infinity, __glibcpp_double_infinity,
        __glibcpp_long_double_infinity): Remove.

From-SVN: r56821