Improve build templates by not having to set ${triggers} in some cases.

There's no need to update triggers in the following cases:
 * Packages installing stuff into /usr/share/applications.
 * Packages setting $gtk_iconcache_dirs.
 * Packages setting $font_dirs.
 * Packages setting ${sgml,xml}_entries.

--HG--
extra : convert_revision : 11c74b41f8cf474e9bf4dbb961b1aa9c6f6540bf

srcpkgs/docbook-xsl/template

@@ -18,7 +18,6 @@ long_desc="
  stylesheet."
 
 noarch=yes
-triggers="xml-catalog"
 
 Add_dependency full xmlcatmgr
 Add_dependency full docbook-xml ">=4.2"