mingw-w64: Use approximations for casinh if real part is small (bug #62332). * src/mingw-w64-complex-inverse-trig.patch: Use approximations for casinh if real part of input is small and the absolute imaginary part is smaller than 1.

#!/bin/bash
## bootstrap script
## Run this to generate the configure script

set -e      # halt if unhandled error
aclocal
autoconf    # generate configure script