buildroot

libembryo: Add new package

[Peter: add upstream URL, remove redundant _INSTALL_TARGET]
Signed-off-by: Will Newton <will.newton@imgtec.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>