ci:travis:prepare_artifacts_rpi.sh: check from dtb and dtbo files

Since the Azure "Copy Files" task appears as succeeded even if no files
are copied, we need to manually check for the presence of the required files.

Signed-off-by: Andreea Andrisan <Andreea.Andrisan@analog.com>

Author: AAndrisa

ci/travis/prepare_artifacts_rpi.sh

@@ -18,14 +18,17 @@ artifacts_structure() {
 	typeKERNEL=( "kernel7" "kernel7l" "kernel" )
 	for index in "${!typeBCM[@]}"; do
 		cd adi_"${typeBCM[$index]}"_defconfig
-		mkdir overlays modules
-		mv ./*.dtbo ./overlays
+		mkdir modules
 		tar -xf rpi_modules.tar.gz -C modules
 		rm rpi_modules.tar.gz
 		mv ./zImage ./"${typeKERNEL[$index]}".img
 		cd ../
 		cp -r ./adi_"${typeBCM[$index]}"_defconfig/* ./${timestamp}
 	done
+	if [ -z "$(ls  ${SOURCE_DIRECTORY}/${timestamp}/*.dtb 2>/dev/null)" ] || [ -z "$(ls  ${SOURCE_DIRECTORY}/${timestamp}/overlays/*.dtbo 2>/dev/null)" ]; then
+		echo "Missing one or more required files"
+		exit 1
+	fi
 	tar -C ${SOURCE_DIRECTORY}/${timestamp}/modules -czvf ${SOURCE_DIRECTORY}/${timestamp}/rpi_modules.tar.gz .
 	rm -r ${SOURCE_DIRECTORY}/${timestamp}/modules
 }