msys2: add ca-certificates, msys2-which * src/msys2-ca-certificates.mk, src/msys2-which.mk, src/src-msys2-which.mk, src/src-msys2-ca-certificates.mk : new files * index.html, dist-files.mk: add ref to new files

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

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