[test] Update ParseableInterface to ModuleInterface

Also remove uses of -emit-parseable-module-interface from tests

test/ModuleInterface/ModuleCache/Inputs/check-is-new.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+#
+# check-is-new.py - a more-legible way to read a timestamp test than test(1)
+#
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See https://swift.org/LICENSE.txt for license information
+# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#
+# ----------------------------------------------------------------------------
+#
+# Compares the mtime of the provided files to a constant "old" reference time.
+# Fails if any file is as-old-or-older than old.
+#
+# ----------------------------------------------------------------------------
+
+import os
+import sys
+
+OLD = 1390550700  # 2014-01-24T08:05:00+00:00
+for f in sys.argv[1:]:
+    if os.stat(f).st_mtime <= OLD:
+        print("%s is not new!" % f)
+        exit(1)