Add sample for exercising the compiler.

python/samples/compiled_add.py

@@ -0,0 +1,18 @@
+# Run full pipeline with:
+#   -npcomp-cpa-type-inference -numpy-public-functions-to-tensor -convert-numpy-to-tcf -canonicalize
+
+import numpy as np
+from npcomp.compiler import test_config
+
+import_global = test_config.create_import_dump_decorator()
+
+global_data = (np.zeros((2, 3)) + [1.0, 2.0, 3.0] * np.reshape([1.0, 2.0],
+                                                               (2, 1)))
+
+a = np.asarray([1.0, 2.0], dtype=np.float32)
+b = np.asarray([3.0, 4.0], dtype=np.float32)
+
+
+@import_global
+def global_add():
+  return np.add(a, np.add(b, a))