PR libfortran/21915
    * Makefile.am: include intrinsics/hyper.c
    * c99_protos.h: add prototypes for single precision versions of
    acosh, asinh, and atanh for platforms that do not have these
    * config.h.in: add #undef for wrappers
    * configure.ac: add checks for single precision versions
    * aclocal.m4: generated
    * Makefile.in: generated
    * configure: generated


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@101302 138bc75d-0d04-0410-961f-82ee72b054a4