samples: add Terra samples

source: https://github.com/zdevito/terra/tree/master/tests

samples/Terra/cfgbug.t

@@ -0,0 +1,14 @@
+local struct Type {
+        field: int
+}
+
+local terra foo(obj: Type) end
+foo:setinlined(false)
+
+local terra bar()
+        var obj: Type
+        defer foo(obj)
+        return
+end
+
+bar()