Place the Swift runtime module in the platform-specific directory for non-Darwin

Author: finagolfin

test/Serialization/runtime-import-from-sdk.swift

@@ -6,13 +6,16 @@
 
 // %t/good-sdk contains a loadable standard library.
 // RUN: %empty-directory(%t/good-sdk)
-// RUN: %empty-directory(%t/good-sdk/usr/lib/swift)
+// RUN: %empty-directory(%t/good-sdk/usr/lib/swift/%target-sdk-name)
 // RUN: cp -r %platform-module-dir/Swift.swiftmodule %t/good-sdk/usr/lib/swift/Swift.swiftmodule
+// RUN: cp -r %platform-module-dir/Swift.swiftmodule %t/good-sdk/usr/lib/swift/%target-sdk-name/Swift.swiftmodule
 
 // %t/bad-sdk contains an invalid standard library that cannot be loaded.
 // RUN: %empty-directory(%t/bad-sdk)
 // RUN: %empty-directory(%t/bad-sdk/usr/lib/swift/Swift.swiftmodule)
+// RUN: %empty-directory(%t/bad-sdk/usr/lib/swift/%target-sdk-name/Swift.swiftmodule)
 // RUN: touch %t/bad-sdk/usr/lib/swift/Swift.swiftmodule/garbage-garbage-garbage.swiftmodule
+// RUN: touch %t/bad-sdk/usr/lib/swift/%target-sdk-name/Swift.swiftmodule/garbage-garbage-garbage.swiftmodule
 
 // %t/empty-toolchain does not contain a standard library.
 // RUN: %empty-directory(%t/empty-toolchain)