travis: More tests debugging.

tests/basics/memoryerror.py

 l = list(range(10000))
-hex(1)
+try:
+    hex(1)
+except NameError:
+    print("NameError")
 try:
     100000000 * l
 except MemoryError:

tests/run-tests

@@ -70,6 +70,8 @@ for test_file in tests:
         rm_f(os.path.basename(test_file + ".exp"))
         rm_f(os.path.basename(test_file + ".out"))
     else:
+        print('EXP|{}|'.format(output_expected))
+        print('OUT|{}|'.format(output_mupy))
         with open(os.path.basename(test_file + ".exp"), "w") as f:
             f.write(str(output_expected, "ascii"))
         with open(os.path.basename(test_file + ".out"), "w") as f: