Import Python jinja2 for working with templates

This provides a framework for dealing with templates. A bit overkill for
what I need to do, but convenient to have around.

Change-Id: I0554a5df120624f36c536655e0578754273555b9
diff --git a/build_tests/python_jinja2.py b/build_tests/python_jinja2.py
new file mode 100644
index 0000000..a926e31
--- /dev/null
+++ b/build_tests/python_jinja2.py
@@ -0,0 +1,4 @@
+#!/usr/bin/python3
+
+# Confirm that we can import jinja2.
+import jinja2