As you may already realized, the source code release does not have the necessary makefiles to re-build the libraries. If you need to make some changes, say on the DCU/OpenVG glue logic drivers, add support to a different display or use something else you will need to rebuild them.
You need to follow the next steps to patch you release and being able to rebuild the drivers:
1. unzip attached file
2. cp -a makefile4lib/* $release_install_dir/vf600_ovg
3. change hal/inc/gc_hal_types.h, define _DBG_EXIT_ to be empty
4. cd tests/rotation_800/build-autovf600-gnu-mqx-d
5. make cleansub allsub MQX_LOC=/media/shared/MQX402EAR1OVG040/lib/vybrid_autoevb_a5.gcc_cs