UBUNTU: [Debian] s390x -- add architecture to kernelconfig

BugLink: http://bugs.launchpad.net/bugs/1488653Signed-off-by: Andy Whitcroft <apw@canonical.com>
(cherry picked from commit 019499429e25c5845a9ff9019819dc91010374fd)
Signed-off-by: Andy Whitcroft <apw@canonical.com>

debian/scripts/misc/kernelconfig

@@ -51,6 +51,7 @@ for arch in $archs; do
 		lpia)		kernarch="x86" 		;;
 		sparc)		kernarch="sparc64"	;;
 		armel|armhf)	kernarch="arm"		;;
+		s390x)		kernarch="s390"		;;
 		*)		kernarch="$arch"	;;
 	esac