encodings: update 1.0.5 -> 1.0.6

Add ability to tweak compressor suffix in filenames, similar
to xorg apps and drivers.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>