Adding old unit tests to test suite.

These tests are copied straight over. They'll still run, but they're
using the old system.

Change-Id: If494519e52ddf858a9febfc55bdae830468cb3c8
diff --git a/test/078-polymorphic-virtual/expected.txt b/test/078-polymorphic-virtual/expected.txt
new file mode 100644
index 0000000..0d29728
--- /dev/null
+++ b/test/078-polymorphic-virtual/expected.txt
@@ -0,0 +1,3 @@
+10000000
+20000000
+30000000