package/weston: bump to version 5.0.0

removes rdp-compositor: fix compilation against FreeRDP 2.0.0 rc2
backport which is now included in 5.0.0

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>