Ensure that image contains rsync so that bin/package.sh works.

If packaging was working before, it was only because of a dirty lambda/ directory
which had already received a copy of the copied files.

A subsequent commit will suggest the use of a clean target on a Makefile to make
cleaning dirty build directories easier to achieve.

Signed-off-by: Jon Seymour <jon@wildducktheories.com>

Author: jonseymour

Dockerfile

@@ -212,6 +212,10 @@ RUN \
     ./config shared --prefix=${PREFIX}/openssl --openssldir=${PREFIX}/openssl; \
     make depend; make install; cd ..; rm -rf openssl
 
+# rsync is required by bin/package.sh, so install it here
+RUN \
+    yum install -y rsync
+
 
 # Copy shell scripts and config files over
 COPY bin/* /usr/local/bin/