Add unzip to the build machines.

docker/Dockerfile_centos6

@@ -29,7 +29,8 @@ RUN yum install -y -q \
       python-setuptools-devel \
       python-devel \
       ccache \
-      distcc
+      distcc \
+      unzip
 ENV LANG en_US.UTF-8
 ENV LC_ALL en_US.UTF-8

docker/Dockerfile_centos7

@@ -29,7 +29,8 @@ RUN yum install -y -q \
       python-setuptools-devel \
       python-devel \
       ccache \
-      distcc
+      distcc \
+      unzip
 ENV LANG en_US.UTF-8
 ENV LC_ALL en_US.UTF-8

docker/Dockerfile_jessie

@@ -32,6 +32,7 @@ RUN apt-get update -q \
       python-dev \
       ccache \
       distcc \
+      unzip \
       apt-transport-https
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen

docker/Dockerfile_opensuse13.2

@@ -36,7 +36,8 @@ RUN zypper -q -n install \
       python-setuptools \
       timezone \
       rpmbuild \
-      ccache 
+      ccache \
+      unzip
 # perl-devel python-setuptools-devel

docker/Dockerfile_opensuse42.1

@@ -37,7 +37,8 @@ RUN zypper -q -n install \
       timezone \
       rpmbuild \
       ccache \
-      distcc
+      distcc \
+      unzip
 # perl-devel python-setuptools-devel

docker/Dockerfile_precise

@@ -32,6 +32,7 @@ RUN apt-get update -q \
       python-dev \
       ccache \
       distcc \
+      unzip \
       apt-transport-https
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen

docker/Dockerfile_rpi_jessie

@@ -42,6 +42,7 @@ RUN apt-get update -q \
       python-dev \
       ccache \
       distcc \
+      unzip \
       apt-transport-https
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen

docker/Dockerfile_rpi_wheezy

@@ -44,6 +44,7 @@ RUN apt-get update -q \
       python-dev \
       ccache \
       distcc \
+      unzip \
       apt-transport-https
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen

docker/Dockerfile_trusty

@@ -32,6 +32,7 @@ RUN apt-get update -q \
       python-dev \
       ccache \
       distcc \
+      unzip \
       apt-transport-https
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen

docker/Dockerfile_wheezy

@@ -32,6 +32,7 @@ RUN apt-get update -q \
       python-dev \
       ccache \
       distcc \
+      unzip \
       apt-transport-https
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen

docker/Dockerfile_xenial

@@ -33,6 +33,7 @@ RUN apt-get update -q \
       python-setuptools \
       ccache \
       distcc \
+      unzip \
       apt-transport-https
 RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen