Add pip to list of default apt-get install list

Change-Id: I31bf9c5510a6d12e35628effc507ef0df4c50ddf
diff --git a/packer/provision/basebuild.sh b/packer/provision/basebuild.sh
index dc1f583..06aa83a 100644
--- a/packer/provision/basebuild.sh
+++ b/packer/provision/basebuild.sh
@@ -38,6 +38,7 @@
         nodejs \
         nodejs-legacy \
         npm \
+        pip \
         # end of apt-get install list
     npm install -g bower
     npm install karma --save-dev