sunxi-cedarx: bump version, improve EABI support

This commit bumps the sunxi-cedarx package version to the latest git
commit, which also provides a better support for ARM EABI, since it
now has a non-EABIhf variant of avheap.so available.

Built tested on ARM EABI and ARM EABIhf.

[Thomas: compared to Spenser's original version, bumped to a newer
 version, and dropped support for the demo since it didn't build,
 and fixing it isn't trivial]

Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>