fireball: update readme
fireball: update readme

Change-Id: Icb1d3f9ecf8b4c8672c4e153db84678ffe1ebec9

mdmower/android_device_htc_fireball,CyanogenMod/android_device_htc_fireball,cyandream-devices/android_device_htc_fireball,Beeko/android_device_htc_fireball,CyanogenMod/android_device_htc_fireball,cyandream-devices/android_device_htc_fireball,Beeko/android_device_htc_fireball,mdmower/android_device_htc_fireball