Use sysfs for indicator led control to allow blinking

If red, green and blue channels are found from sysfs, those are
used for led control instead of the libhardware functions.

[hybris.so] Use sysfs for indicator led control to allow blinking
Reset led when switching patterns

The blinking must be disabled before programming new blink
period and color.
Merge pull request #6 from spiiroin/blink_leds

Use sysfs for indicator led control to allow blinking