WIP: Delete the automake support.

The meson build was in the last release, giving people a chance to
switch.  It provides faster builds with a smaller, easier build
description language, so it's time to retire automake.

TODO:
    developer docs build
    dtrace
    BUNDLE_ID_PREFIX
    Test actually building xquartz
    sha1 lib options

Signed-off-by: Eric Anholt <eric@anholt.net>
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