log4cxx: disable unused documentation

Saves around 14 MiB of data in /usr/share/log4cxx/html.

Signed-off-by: Johan Derycke <johan.derycke@barco.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/log4cxx/log4cxx.mk

@@ -13,7 +13,10 @@ LOG4CXX_LICENSE_FILES = LICENSE
 
 LOG4CXX_CONF_OPTS = \
 	--with-apr=$(STAGING_DIR)/usr/bin/apr-1-config \
-	--with-apr-util=$(STAGING_DIR)/usr/bin/apu-1-config
+	--with-apr-util=$(STAGING_DIR)/usr/bin/apu-1-config \
+	--disable-dot \
+	--disable-doxygen \
+	--disable-html-docs
 
 LOG4CXX_DEPENDENCIES = apr apr-util