Address review comments for Package.swift

Author: parkera

Package.swift

@@ -7,7 +7,6 @@ let coreFoundationBuildSettings: [CSetting] = [
     .headerSearchPath("internalInclude"),
     .define("DEBUG", .when(configuration: .debug)),
     .define("CF_BUILDING_CF"),
-    .define("DEPLOYMENT_RUNTIME_SWIFT", .when(platforms: [.linux])),
     .define("DEPLOYMENT_ENABLE_LIBDISPATCH"),
     .define("HAVE_STRUCT_TIMESPEC"),
     .define("SWIFT_CORELIBS_FOUNDATION_HAS_THREADS"),
@@ -35,32 +34,23 @@ let coreFoundationBuildSettings: [CSetting] = [
     .unsafeFlags(["-I/usr/lib/swift"], .when(platforms: [.linux, .android])) // dispatch
 ]
 
-#if os(macOS)
 let coreFoundationLinkerSettings: [LinkerSetting] = [
-    .unsafeFlags([
-        "-Xlinker",
-        "-alias_list",
-        "-Xlinker",
-        "\(Context.packageDirectory)/Sources/CoreFoundation/DarwinSymbolAliases",
-    ])
+    .unsafeFlags(["-Xlinker", "-alias_list", "-Xlinker", "\(Context.packageDirectory)/Sources/CoreFoundation/DarwinSymbolAliases",], .when(platforms: [.macOS]))
 ]
-#else
-let coreFoundationLinkerSettings: [LinkerSetting] = []
-#endif
 
 // For _CFURLSessionInterface, _CFXMLInterface
 let interfaceBuildSettings: [CSetting] = [
     .headerSearchPath("../CoreFoundation/internalInclude"),
     .headerSearchPath("../CoreFoundation/include"),
     .define("DEBUG", .when(configuration: .debug)),
     .define("CF_BUILDING_CF"),
-    .define("DEPLOYMENT_RUNTIME_SWIFT"),
     .define("DEPLOYMENT_ENABLE_LIBDISPATCH"),
     .define("HAVE_STRUCT_TIMESPEC"),
     .define("SWIFT_CORELIBS_FOUNDATION_HAS_THREADS"),
     .define("_GNU_SOURCE", .when(platforms: [.linux, .android])),
     .define("TARGET_OS_WASI", to: "0", .when(platforms: [.macOS])),
     .define("TARGET_OS_BSD", to: "0", .when(platforms: [.macOS])),
+    .define("TARGET_OS_ANDROID", to: "0", .when(platforms: [.macOS])),
     .define("INCLUDE_OBJC", to: "1", .when(platforms: [.macOS])),
     .unsafeFlags([
         "-Wno-shorten-64-to-32",
@@ -81,7 +71,7 @@ let interfaceBuildSettings: [CSetting] = [
 ]
 
 let swiftBuildSettings: [SwiftSetting] = [
-    .define("DEPLOYMENT_RUNTIME_SWIFT"), 
+    .define("DEPLOYMENT_RUNTIME_SWIFT"),
     .define("SWIFT_CORELIBS_FOUNDATION_HAS_THREADS"),
 ]