chore(Dockerfile): update glide to version 0.8.3

Author: Aaron Schlesinger

rootfs/Dockerfile

@@ -5,10 +5,10 @@ ENV GLIDE_HOME=/root
 
 WORKDIR /tmp
 
-RUN wget https://github.com/Masterminds/glide/releases/download/0.8.1/glide-0.8.1-linux-amd64.tar.gz && \
-  tar xvfz glide-0.8.1-linux-amd64.tar.gz && \
+RUN wget https://github.com/Masterminds/glide/releases/download/0.8.3/glide-0.8.3-linux-amd64.tar.gz && \
+  tar xvfz glide-0.8.3-linux-amd64.tar.gz && \
   mv linux-amd64/glide /usr/local/bin/ && \
-  rm -rf linux-amd64 glide-0.8.1-linux-amd64.tar.gz
+  rm -rf linux-amd64 glide-0.8.3-linux-amd64.tar.gz
 
 RUN go get -u -v github.com/golang/lint/golint github.com/onsi/ginkgo/ginkgo