exclude ADK_PKG_DESKTOP for allmodconfig

mk/build.mk

@@ -46,6 +46,7 @@ DEFCONFIG=		ADK_DEBUG=n \
 			ADK_PACKAGE_VIRTINST=n \
 			ADK_PACKAGE_URLGRABBER=n \
 			ADK_PACKAGE_PERL=n \
+			ADK_PKG_DESKTOP=n \
 			ADK_PKG_LAPTOP=n \
 			ADK_PKG_MPDBOX=n \
 			ADK_PKG_DEVELOPMENT=n \