gts @0.7.6-20121130_1: universal build fails on M1 Mac

[kencu (Ken)]

checking build system type... arm-apple-darwin22.2.0
checking host system type... Invalid configuration `aarch64-apple-darwin22.2.0': machine `aarch64-apple' not recognized
configure: error: /bin/sh ./config.sub aarch64-apple-darwin22.2.0 failed

the non-universal build succeeds

[kencu (Ken)]

adding the usual block works:

platform darwin arm {
    depends_build-append    port:automake

    post-patch {
        # Use newer config.guess and config.sub to support Apple Silicon.
        set automake_dirs [glob -directory ${prefix}/share automake-*]
        set automake_dir [lindex [lsort -command vercmp $automake_dirs] end]
        copy -force ${automake_dir}/config.guess ${automake_dir}/config.sub \
            ${worksrcpath}
    }
}

 % port -v installed gts
The following ports are currently installed:
  gts @0.7.6-20121130_1 requested_variants='' platform='darwin 22' archs='arm64' date='2022-12-29T12:06:07-0800'
  gts @0.7.6-20121130_1+universal (active) requested_variants='+universal' platform='darwin 22' archs='arm64 x86_64' date='2023-01-02T13:41:41-0800'

[Ken <21211439+kencu@…>]

In 2eae0ef4ae75dcb28119099399a6e925dc266a72/macports-ports (master):

gts: fix universal build on M1 Mac (​https://github.com/macports/macports-ports/pull/17176)

closes: #66605