xserver: Add xkeyboard-config as a dependency

xkeyboard-config is required to install keymap files to the target,
without which the X server does not start.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/x11r7/xserver_xorg-server/Config.in

@@ -47,6 +47,7 @@ config BR2_PACKAGE_XSERVER_XORG_SERVER
 	select BR2_PACKAGE_XPROTO_XF86VIDMODEPROTO
 	select BR2_PACKAGE_XPROTO_XPROTO
 	select BR2_PACKAGE_XUTIL_UTIL_MACROS
+	select BR2_PACKAGE_XKEYBOARD_CONFIG
 	depends on !BR2_avr32
 	help
 	  xorg-server 1.7.5

package/x11r7/xserver_xorg-server/xserver_xorg-server.mk

@@ -53,6 +53,7 @@ XSERVER_XORG_SERVER_DEPENDENCIES = 	\
 	xproto_xf86rushproto 		\
 	xproto_xf86vidmodeproto 	\
 	xproto_xproto 			\
+	xkeyboard-config		\
 	pixman 				\
 	openssl 			\
 	mcookie