Update checkout to swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a.

Author: dan-zheng

utils/update_checkout/update-checkout-config.json

@@ -278,23 +278,23 @@
         "tensorflow": {
             "aliases": ["tensorflow"],
             "repos": {
-                "llvm-project": "8ec2a24d414c19db71543c49fa0ddef2b9b0e3a5",
+                "llvm-project": "552d175014c8ef68b85cb29f152d7331831925a5",
                 "swift": "tensorflow",
-                "cmark": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
-                "llbuild": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
+                "cmark": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
+                "llbuild": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
                 "swift-tools-support-core": "0.0.1",
-                "swiftpm": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
-                "swift-syntax": "ed002604feb028333e9fe3612cadc8ace8c4e3ec",
-                "swift-stress-tester": "25bf842a7fd6b0b62791231c93e50a9feecbaf77",
-                "swift-corelibs-xctest": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
-                "swift-corelibs-foundation": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
-                "swift-corelibs-libdispatch": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
-                "swift-integration-tests": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
-                "swift-xcode-playground-support": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
+                "swiftpm": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
+                "swift-syntax": "1e524b3edc47e8ff66890d914b8bcd024e061631",
+                "swift-stress-tester": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
+                "swift-corelibs-xctest": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
+                "swift-corelibs-foundation": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
+                "swift-corelibs-libdispatch": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
+                "swift-integration-tests": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
+                "swift-xcode-playground-support": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
                 "ninja": "release",
                 "icu": "release-65-1",
-                "indexstore-db": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
-                "sourcekit-lsp": "swift-DEVELOPMENT-SNAPSHOT-2019-12-09-a",
+                "indexstore-db": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
+                "sourcekit-lsp": "swift-DEVELOPMENT-SNAPSHOT-2019-12-16-a",
                 "tensorflow": "7c7d924821a8b1b20433c2f3f484bbd409873a84",
                 "tensorflow-swift-apis": "47de23315b574f936daefe1e781bbfd5dfe1a247",
                 "tensorflow-swift-quote": "34d4112c294e9eccfb575dd8f39e6e3b0b6bc008"