i9300: update hardkey overlay

config_deviceHardwareKeys=71 (home-1, back-2, menu-4, volume rockers-64)
config_deviceHardwareWakeKeys=65 (only home and volume rockers can wake it)
Merge branch 'cm-12.0' of https://github.com/ArchiDroid/android_device_samsung_i9300 into cm-12.0