"Official" TDF Mac builds are done w/o ext-wiki-publisher

...since LO 4.1.3, cf.
<http://lists.freedesktop.org/archives/libreoffice/2013-October/057006.html>
"minutes of ESC call ...," and the underlying issue (Java extension's Addons.xcu
causing JVM instantiation upon start of Writer on Mac) has not been addressed
since, and Norbert confirmed on IRC that he did the disabling by locally
specifying --disable-ext-wiki-publisher on the build machines and continues to
use that configuration for all builds since (LO 4.1.4, 4.2.0, 32- and 64-bit),
so better reflect that directly in distro-configs.

Change-Id: Ib40588a5a6e49f7b9f58df8f1f4eb146de003444
(cherry picked from commit 1e54386411055b0049760faff2e1374a83191913)
Reviewed-on: https://gerrit.libreoffice.org/7612
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>