Fix CMake build

Author: yim-lee

Sources/Basics/CMakeLists.txt

@@ -1,6 +1,6 @@
 # This source file is part of the Swift.org open source project
 #
-# Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
+# Copyright (c) 2014 - 2021 Apple Inc. and the Swift project authors
 # Licensed under Apache License v2.0 with Runtime Library Exception
 #
 # See http://swift.org/LICENSE.txt for license information
@@ -17,7 +17,8 @@ add_library(Basics
   HTTPClient.swift
   JSON+Extensions.swift
   Sandbox.swift
-  SwiftVersion.swift)
+  SwiftVersion.swift
+  SQLiteBackedCache.swift)
 target_link_libraries(Basics PUBLIC
   TSCBasic
   TSCUtility)