Merge pull request swiftlang#24750 from Rostepher/no-platform-to-stand-on

[Build System: CMake] Add missing SWIFT_STDLIB_LIBRARY_TYPES to the StandaloneOverlay.cmake module.

Author: Rostepher

cmake/modules/StandaloneOverlay.cmake

@@ -84,6 +84,7 @@ set(SWIFT_APPLE_PLATFORMS
 set(BUILD_STANDALONE TRUE)
 set(SWIFT_BUILD_STANDALONE_OVERLAY TRUE)
 
+set(SWIFT_STDLIB_LIBRARY_BUILD_TYPES "SHARED")
 set(SWIFT_SDK_OVERLAY_LIBRARY_BUILD_TYPES "SHARED")