libfslcodec: bump version to 4.0.2

This patch is based on the Yocto equivalent:
https://github.com/Freescale/meta-fsl-arm/commit/1a564bcf14c49356667dd91f90f07891cf2f9064

This package has been implicitely tested through gstreamer as the 0.10 plugin
relies on it:
 # gst-launch-0.10 playbin uri=file:///root/tears_of_steel_1080p.webm



Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>