Merge topic 'enable_language-CMP0126'

078ba4b2 Swift: Update test case to try CMP0126 NEW behavior

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !6375

Tests/SwiftOnly/CMakeLists.txt

 cmake_minimum_required(VERSION 3.3)
+if(POLICY CMP0126)
+  cmake_policy(SET CMP0126 NEW)
+endif()
 
 # NOTE: Force the Release mode configuration as there are some issues with the
 # debug information handling on macOS on certain Xcode builds.