Add python-mako and phosphor-logging dependencies

Change-Id: Iceb3e71acd196126794f840fe8ff8655f28cebff
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/build-unit-test-docker.sh b/build-unit-test-docker.sh
index 2fe5256..23fd2ba 100755
--- a/build-unit-test-docker.sh
+++ b/build-unit-test-docker.sh
@@ -50,6 +50,7 @@
     python-dev \
     python-git \
     python-yaml \
+    python-mako \
     python-setuptools \
     pkg-config \
     autoconf \