Fix post build

bsp/board/domo/scripts/post-build.sh

@@ -32,12 +32,12 @@ done
 fi
 
 # Copy the overlay of the target.
-if [ -d ${PROJECT}/ovl ]; then
+if [ -d ${BR_PROJECT}/ovl ]; then
 	mkdir -p ${BR_STAGING}/buildroot/target/usr/local/
 	cp -a ${BR_PROJECT}/ovl/* ${BR_STAGING}/buildroot/target/
 fi
 
 # Finaly apply post build script of the target if the script exist.
-if [ -e ${PROJECT}/post-build.sh ]; then 
-	${PROJECT}/post-build.sh
+if [ -e ${BR_PROJECT}/post-build.sh ]; then 
+	${BR_PROJECT}/post-build.sh
 fi