xkeyboard-config: add missing dependency on host-gettext and sanitize

xkeyboard-config needs msgfmt so we need to pull host-gettext into the
dependencies.
And remove GMSGFMT path hardcoding otherwise host-gettext msgfmt won't
work. Fixes:
http://autobuild.buildroot.net/results/ec956056aba54ab7993cf58a74a93a3b900dee95/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/x11r7/xkeyboard-config/xkeyboard-config.mk

@@ -6,8 +6,7 @@
 XKEYBOARD_CONFIG_VERSION = 2.6
 XKEYBOARD_CONFIG_SOURCE = xkeyboard-config-$(XKEYBOARD_CONFIG_VERSION).tar.bz2
 XKEYBOARD_CONFIG_SITE = http://www.x.org/releases/individual/data/xkeyboard-config/
-XKEYBOARD_CONFIG_DEPENDENCIES = host-intltool host-xapp_xkbcomp xlib_libX11 xproto_xproto
-XKEYBOARD_CONFIG_CONF_OPT = GMSGFMT=/usr/bin/msgfmt
+XKEYBOARD_CONFIG_DEPENDENCIES = host-gettext host-intltool host-xapp_xkbcomp xlib_libX11 xproto_xproto
 
 $(eval $(autotools-package))