Merge pull request #2357 from apple/windows-android-cross-compile

build: allow passing Swift specific link flags

Author: compnerd

cmake/modules/SwiftSupport.cmake

@@ -41,7 +41,7 @@ function(add_swift_target target)
   cmake_parse_arguments(AST "${options}" "${single_value_options}" "${multiple_value_options}" ${ARGN})
 
   set(compile_flags ${CMAKE_SWIFT_FLAGS})
-  set(link_flags)
+  set(link_flags ${CMAKE_SWIFT_LINK_FLAGS})
 
   list(APPEND compile_flags -incremental)
   ProcessorCount(CPU_COUNT)