...with versions of those files from the latest
<http://ftp.gnu.org/gnu/automake/automake-1.15.tar.xz>.

The current versions failed for a Flathub aarch64 test build, see
<https://flathub.org/builds/#/builders/6/builds/274>.

Some existing patches already did local modifications to those
config.{guess,sub} files, apparently to address build issues on Android, iOS,
and macOS.  I removed all of them, hoping that the latest versions of the files
already address all those issues.

Change-Id: I13e58479d4e3a0598a00c69674885ca540092b53
Reviewed-on: https://gerrit.libreoffice.org/41987Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>