[gnome-commander] Fix error in Dockerfile from last commit

[Uwe Scholz <uwescholz src gnome org>]

commit 1b1ac38a7c919b2d5e2cf94f3f6019ce47d996a5
Author: Uwe Scholz <uwescholz src gnome org>
Date:   Fri Apr 14 17:20:50 2017 +0200

    Fix error in Dockerfile from last commit

 Dockerfile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index 6f2471e..f0a160f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ RUN \
   apt-get install -yq sudo && \
   echo $LANG && \
   echo $LC_ALL && \
-  sudo apt-get build-dep gnome-commander -y &&
+  sudo apt-get build-dep gnome-commander -y && \
   sudo apt-get install -y -qq autoconf-archive cmake flex git-core gnome-common libglib2.0-dev libgtest-dev 
libunique-dev yelp-tools
 
 RUN \