cmake/test: don't test swift on ios/tvos platform

cmake/test/CMakeLists.txt

@@ -27,7 +27,9 @@ add_feature_info("TEST_SHARED" TEST_SHARED "Test linking with shared library")
 option(TEST_STATIC "Test linking to static SDL2 library" ON)
 add_feature_info("TEST_STATIC" TEST_STATIC "Test linking with static library")
 
-if(APPLE)
+# FIXME: how to target ios/tvos with Swift?
+# https://gitlab.kitware.com/cmake/cmake/-/issues/20104
+if(APPLE AND CMAKE_SYSTEM_NAME MATCHES ".*(Darwin|MacOS).*")
     # multiple values for CMAKE_OSX_ARCHITECTURES not supported with Swift
     list(LENGTH CMAKE_OSX_ARCHITECTURES count_osx_archs)
     if(count_osx_archs LESS_EQUAL 1)