Move MemUsage into run-test.

Change-Id: If14a75aa1a2297ea51577baa5b4ee9e654c5db1a
diff --git a/test/103-string-append/expected.txt b/test/103-string-append/expected.txt
new file mode 100644
index 0000000..f75da10
--- /dev/null
+++ b/test/103-string-append/expected.txt
@@ -0,0 +1 @@
+Test complete