Use lastest swift-DEVELOPMENT not swift-5.3-DEVELOPMENT

Author: xihui-wu

utils/update_checkout/update-checkout-config.json

@@ -353,24 +353,24 @@
             "repos": {
                 "llvm-project": "da604d2fe08fbb667b844469ff9197469227345e",
                 "swift": "tensorflow",
-                "cmark": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
-                "llbuild": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
+                "cmark": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
+                "llbuild": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
                 "swift-tools-support-core": "0.0.1",
-                "swiftpm": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
+                "swiftpm": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
                 "swift-argument-parser": "0.0.5",
                 "swift-driver": "master",
-                "swift-syntax": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
-                "swift-stress-tester": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
-                "swift-corelibs-xctest": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
-                "swift-corelibs-foundation": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
-                "swift-corelibs-libdispatch": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
-                "swift-integration-tests": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
-                "swift-xcode-playground-support": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
+                "swift-syntax": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
+                "swift-stress-tester": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
+                "swift-corelibs-xctest": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
+                "swift-corelibs-foundation": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
+                "swift-corelibs-libdispatch": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
+                "swift-integration-tests": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
+                "swift-xcode-playground-support": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
                 "ninja": "release",
                 "icu": "release-65-1",
                 "yams": "3.0.1-patched",
-                "indexstore-db": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
-                "sourcekit-lsp": "swift-5.3-DEVELOPMENT-SNAPSHOT-2020-06-01-a",
+                "indexstore-db": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
+                "sourcekit-lsp": "swift-DEVELOPMENT-SNAPSHOT-2020-05-26-a",
                 "PythonKit": "master",
                 "swift-format": "master",
                 "tensorflow": "v2.2.0-rc0",