...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