Dockerfile: add curl

Used to download daemon dependencies

Change-Id: Idf5e6102644d1d5326d18122f3d43ede48cd953d
diff --git a/docker/Dockerfile b/docker/Dockerfile
index fa18291..756b02b 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -32,6 +32,7 @@
 	software-properties-common \
 	unzip \
 	wget \
+	curl \
 	yasm \
 	zip \
 	&& locale-gen $LANG $LC_ALL && update-locale $LANG $LC_ALL