move platform specific base-files into target/linux/<targetname>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5621 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ar7-2.4/base-files/sbin/mount_root

@@ -0,0 +1,28 @@
+#!/bin/sh
+size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
+mount none /tmp -t tmpfs -o size=$size
+
+if [ "$1" != "failsafe" ]; then 
+	mtd unlock linux
+	mount | grep jffs2 >&-
+	if [ $? = 0 ] ; then
+		if [ $(cat /proc/mtd | wc -l) = 6 ]; then
+			mtd erase OpenWrt
+		else
+			mount -o remount,rw /dev/root /
+		fi
+	else
+		. /bin/firstboot
+		echo "switching to jffs2"
+		mount /dev/mtdblock/4 /jffs -t jffs2
+		pivot /jffs /rom || {
+			echo "jffs2 unusable; using ramdisk"
+			ramoverlay
+		}
+	fi
+fi
+
+mount none /tmp -t tmpfs -o remount,nosuid,nodev,mode=1777
+mkdir -p /dev/pts
+mount none /dev/pts -t devpts
+mount -t sysfs none /sys 2>&-