bison: bump to version 2.6.3

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

package/bison/bison.mk

@@ -4,7 +4,7 @@
 #
 #############################################################
 
-BISON_VERSION = 2.6.2
+BISON_VERSION = 2.6.3
 BISON_SITE = $(BR2_GNU_MIRROR)/bison
 BISON_LICENSE = GPLv3+
 BISON_LICENSE_FILES = COPYING