[build] Pass target argument to the linker if needed (#31794)

Following #31125 and #31612, `-target` is not added automatically to
linker flags when that's needed (e.g. when building for Apple SDKs) --
mimic the logic used to add it for compiler flags.

Addresses rdar://63138761

Author: edymtt

cmake/modules/AddSwift.cmake

@@ -555,6 +555,15 @@ function(add_swift_host_library name)
       target_link_options(${name} PRIVATE
         "LINKER:-current_version,${SWIFT_COMPILER_VERSION}")
     endif()
+
+    set(DEPLOYMENT_VERSION "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_DEPLOYMENT_VERSION}")
+    # MSVC, clang-cl, gcc don't understand -target.
+    if(CMAKE_C_COMPILER_ID MATCHES "Clang" AND NOT SWIFT_COMPILER_IS_MSVC_LIKE)
+      get_target_triple(target target_variant "${SWIFT_HOST_VARIANT_SDK}" "${SWIFT_HOST_VARIANT_ARCH}"
+        MACCATALYST_BUILD_FLAVOR ""
+        DEPLOYMENT_VERSION "${DEPLOYMENT_VERSION}")
+      target_link_options(${name} PRIVATE -target;${target})
+    endif()
   endif()
 
   add_dependencies(dev ${name})