Merge pull request #183 from kateinoigakukun/katei/suppress-cmakelists-warning-1.3

[1.3] Suppress unhandled CMakeLists.txt warning by SwiftPM

Author: glessard

Package.swift

@@ -27,11 +27,13 @@ let package = Package(
     targets: [
       .target(
         name: "CSystem",
-        dependencies: []),
+        dependencies: [],
+        exclude: ["CMakeLists.txt"]),
       .target(
         name: "SystemPackage",
         dependencies: ["CSystem"],
         path: "Sources/System",
+        exclude: ["CMakeLists.txt"],
         cSettings: [
           .define("_CRT_SECURE_NO_WARNINGS")
         ],