Add chmod +x to start scripts in dockerfiles

docker/btcd/Dockerfile

@@ -35,3 +35,7 @@ VOLUME ["/rpc"]
 
 COPY "start-btcctl.sh" .
 COPY "start-btcd.sh" .
+
+RUN chmod +x start-btcctl.sh
+RUN chmod +x start-btcd.sh
+

docker/lnd/Dockerfile

@@ -23,3 +23,4 @@ RUN glide install
 RUN go install . ./cmd/...
 
 COPY "docker/lnd/start-lnd.sh" .
+RUN chmod +x start-lnd.sh