codegen: Add XML schema and RSDL from latest 3.3.3

This patch adds the XML schema and RSDL documents obtained from the
latest build of the engine, branch 3.3.3, commit 44600e.

Change-Id: I793090ac5aa68b8ea19960bc8feea9ac0bdb573c
Signed-off-by: Juan Hernandez <juan.hernandez@redhat.com>