Add missing repositories, fix IO.swift build error

Author: MaxDesiatov

stdlib/private/SwiftPrivate/IO.swift

@@ -16,12 +16,16 @@ import SwiftShims
 #if canImport(Darwin)
 import Darwin
 let (platform_read, platform_write, platform_close) = (read, write, close)
-#elseif canImport(Glibc)
-import Glibc
-let (platform_read, platform_write, platform_close) = (read, write, close)
 #elseif os(Windows)
 import CRT
 import WinSDK
+#else
+#if os(WASI)
+import WASILibc
+#elseif canImport(Glibc)
+import Glibc
+#endif
+let (platform_read, platform_write, platform_close) = (read, write, close)
 #endif
 
 #if os(Windows)

utils/update_checkout/update-checkout-config.json

@@ -97,6 +97,7 @@
                 "swift-collections": "1.0.1",
                 "swift-crypto": "1.1.5",
                 "swift-driver": "main",
+                "swift-numerics": "1.0.1",
                 "swift-syntax": "main",
                 "swift-system": "1.1.1",
                 "swift-stress-tester": "main",
@@ -111,7 +112,17 @@
                 "cmake": "v3.19.6",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "main"
+                "swift-format": "main",
+                "swift-installer-scripts": "main",
+                "swift-docc": "main",
+                "swift-lmdb": "main",
+                "swift-docc-render-artifact": "main",
+                "swift-docc-symbolkit": "main",
+                "swift-markdown": "main",
+                "swift-cmark-gfm": "gfm",
+                "swift-nio": "2.31.2",
+                "swift-nio-ssl": "2.15.0",
+                "swift-experimental-string-processing": "dev/5"
             }
         },
        "main": {