lxdoom: add dependency to a xserver in Makefile

This patch corrects the commit r23467 and replaces uclibc with
xserver_xorg-server in LXDOOM_DEPENDENCIES.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>

package/games/lxdoom/lxdoom.mk

@@ -15,6 +15,6 @@ LXDOOM_CONF_OPT = --target=$(GNU_TARGET_NAME) --host=$(GNU_TARGET_NAME) \
 		--includedir=/usr/include --enable-shared \
 		$(DISABLE_NLS)
 
-LXDOOM_DEPENDENCIES = uclibc
+LXDOOM_DEPENDENCIES = xserver_xorg-server
 
 $(eval $(call AUTOTARGETS,package/games,lxdoom))