start a shell only on 2.6 system on second serial device, reported by Peter Urbanec, triggers a bug on Asus WL500g deluxe

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@1965 3c298f89-4303-0410-b956-a3cf2f4a3e73

openwrt/package/base-files/default/etc/inittab

@@ -1,4 +1,3 @@
 ::sysinit:/etc/init.d/rcS
 ::shutdown:/sbin/halt
 tts/0::askfirst:/bin/ash --login
-tts/1::askfirst:/bin/ash --login

openwrt/target/linux/package/openwrt/files/brcm-2.6/etc/inittab

@@ -0,0 +1,4 @@
+::sysinit:/etc/init.d/rcS
+::shutdown:/sbin/halt
+tts/0::askfirst:/bin/ash --login
+tts/1::askfirst:/bin/ash --login