pi@raspberrypi ~ $ uname -a
Linux raspberrypi 3.18.11+ #781 PREEMPT Tue Apr 21 18:02:18 BST 2015 armv6l GNU/Linux

sudo update-rc.d hostapd enable
sudo update-rc.d isc-dhcp-server enable

pi@raspberrypi ~ $ sudo update-rc.d hostapd enable
update-rc.d: using dependency based boot sequencing
update-rc.d: error: no runlevel symlinks to modify, aborting!
pi@raspberrypi ~ $ sudo update-rc.d isc-dhcp-server enable
update-rc.d: using dependency based boot sequencing
pi@raspberrypi ~ $

wget https://github.com/jenssegers/RTL8188-hostapd/archive/v1.1.tar.gz
tar -zxvf v1.1.tar.gz
cd RTL8188-hostapd-1.1/hostapd
sudo make
sudo make install

sudo update-rc.d hostapd defaults

#!/bin/sh

### BEGIN INIT INFO
# Provides:          hostapd
# Required-Start:
# Required-Stop:
# Should-Start:
# Default-Start:     2 3 4 5
# Default-Stop:
# Short-Description: Hostapd Service
# Description:       Intended to start hostapd on system startup.
### END INIT INFO

set -e

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

case "$1" in
    start)
        /usr/sbin/hostapd -B
        ;;
    *)
        echo "Usage: $NAME {start}" >&2
        exit 3
        ;;
esac