CI: if all 3 attempts of upload failed, exit with status code '1'

scripts/build/ci/cirrus-ci_dispatcher.sh

@@ -106,13 +106,18 @@ if ! $DO_UPLOAD; then
 
 	./build-package.sh -a "$TERMUX_ARCH" -I $PACKAGE_NAMES
 else
-	for _ in 1 2 3; do
+	for attempt in 1 2 3; do
 		echo "[*] Uploading packages to Bintray:"
 		if ./scripts/package_uploader.sh -p "${PWD}/debs" $PACKAGE_NAMES; then
 			break
 		else
-			echo "[!] Failure, retrying in 30 seconds..."
-			sleep 30
+			if [ "$attempt" = "3" ]; then
+				echo "[!] Went through 3 attempts of upload, giving up..."
+				exit 1
+			else
+				echo "[!] Failure, retrying in 30 seconds..."
+				sleep 30
+			fi
 		fi
 	done
 fi