Merge changes I1bf07301,I48e8ebf3 am: c17c5b00 am: d4aca92a

    symlink /proc/self/fd/1 /dev/stdout

    symlink /proc/self/fd/2 /dev/stderr

    symlink /system/bin /bin

    symlink /system/etc /etc

    # Backward compatibility.

    symlink /sys/kernel/debug /d

    # Link /vendor to /system/vendor for devices without a vendor partition.

    symlink /system/vendor /vendor

    # Create energy-aware scheduler tuning nodes

    mkdir /dev/stune/foreground

    mkdir /dev/stune/background

    mkdir /mnt/runtime/full/self 0755 root root

    # Symlink to keep legacy apps working in multi-user world

    symlink /storage/self/primary /sdcard

    symlink /storage/self/primary /mnt/sdcard

    symlink /mnt/user/0/primary /mnt/runtime/default/self/primary