gnuchess: use the new gettext logic

This commit switches to use the new gettext logic, which involves:

 - using TARGET_NLS_DEPENDENCIES instead of hand-encoded dependencies
   on gettext/host-gettext

 - dropping BR2_PACKAGE_GETTEXT selection

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

package/gnuchess/Config.in

@@ -3,7 +3,6 @@ config BR2_PACKAGE_GNUCHESS
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_PACKAGE_FLEX
-	select BR2_PACKAGE_GETTEXT if BR2_NEEDS_GETTEXT_IF_LOCALE
 	help
 	  GNU Chess lets most modern computers play a full game of chess.
 

package/gnuchess/gnuchess.mk

@@ -11,6 +11,6 @@ GNUCHESS_LICENSE_FILES = COPYING
 
 GNUCHESS_DEPENDENCIES = host-flex flex
 GNUCHESS_DEPENDENCIES += $(if $(BR2_PACKAGE_READLINE),readline) \
-	$(if $(BR2_NEEDS_GETTEXT_IF_LOCALE),gettext)
+	$(TARGET_NLS_DEPENDENCIES)
 
 $(eval $(autotools-package))