Fix accidental duplication of library names.

In AddSwiftStdlib.cmake, we're adding library names twice for target
executables, once with the path and once without.  This appears to break
things on Windows when building the SDKs.

rdar://106104132

Author: al45tair

stdlib/cmake/modules/AddSwiftStdlib.cmake

@@ -2772,7 +2772,7 @@ function(add_swift_target_executable name)
       # Swift compiles depend on swift modules, while links depend on
       # linked libraries.  Find targets for both of these here.
       set(swiftexe_module_dependency_targets)
-      set(swiftexe_link_libraries_targets ${SWIFTEXE_TARGET_LINK_LIBRARIES})
+      set(swiftexe_link_libraries_targets)
       foreach(mod ${swiftexe_module_depends_flattened})
         if(DEFINED maccatalyst_build_flavor)
           if(maccatalyst_build_flavor STREQUAL "zippered")