re PR libfortran/47716 (libgfortran quadmath_weak.h not found on NetBSD 5.1)

2011-02-15  Tobias Burnus  <burnus@net-b.de>

        PR fortran/47716
        PR fortran/47648
        * acinclude.m4 (LIBGFOR_CHECK_FLOAT128): Use check from
        libquadmath, which uses more features.
        * configure: Regenerate.

From-SVN: r170200