build: overwrite the fat libraries with the targets

Ensure that the use the target specific names for the fat libraries for
non-MachO targets which do not support fat libraries.  This fixes the
windows build.

Author: compnerd

cmake/modules/AddSwift.cmake

@@ -2151,6 +2151,7 @@ function(_add_swift_executable_single name)
         "${SWIFTEXE_SINGLE_LINK_FAT_LIBRARIES}"
         "-${SWIFT_SDK_${SWIFTEXE_SINGLE_SDK}_LIB_SUBDIR}-${SWIFTEXE_SINGLE_ARCHITECTURE}"
         SWIFTEXE_SINGLE_LINK_FAT_LIBRARIES_TARGETS)
+    set(SWIFTEXE_SINGLE_LINK_FAT_LIBRARIES ${SWIFTEXE_SINGLE_LINK_FAT_LIBRARIES_TARGETS})
   endif()
 
   handle_swift_sources(