gnuchess: add missing dependencies on flex and host-flex

And also add a missing newline and licensing informations while we're
at it.

Fixes:
http://autobuild.buildroot.org/results/2851f23990c9f6642b1e706a94b1afc15a24b6f7/build-end.log.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/gnuchess/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_GNUCHESS
 	bool "gnuchess"
 	depends on BR2_TOOLCHAIN_HAS_THREADS
+	select BR2_PACKAGE_FLEX
 	help
 	  GNU Chess lets most modern computers play a full game of chess.
 

package/gnuchess/gnuchess.mk

@@ -3,11 +3,15 @@
 # gnuchess
 #
 #############################################################
+
 GNUCHESS_VERSION = 5.07
 GNUCHESS_SOURCE = gnuchess-$(GNUCHESS_VERSION).tar.gz
 GNUCHESS_SITE = $(BR2_GNU_MIRROR)/chess
+GNUCHESS_LICENSE = GPLv2+
+GNUCHESS_LICENSE_FILES = COPYING
 
-GNUCHESS_DEPENDENCIES = $(if $(BR2_PACKAGE_READLINE),readline)
+GNUCHESS_DEPENDENCIES = host-flex flex
+GNUCHESS_DEPENDENCIES += $(if $(BR2_PACKAGE_READLINE),readline)
 
 $(eval $(autotools-package))