Features: Test feature propagation with more-common features.

The purpose of the feature listing in these tests is to make other
features from the same feature set (eg "C++11 features") available.

The compilers under test until now have supported these 'activation
features', but MSVC does not.  Use the cxx_static_assert feature
instead to activate the feature set.

Tests/CompileFeatures/CMakeLists.txt

@@ -127,12 +127,12 @@ if (CMAKE_CXX_COMPILE_FEATURES)
   target_compile_definitions(CompileFeaturesGenex PRIVATE HAVE_OVERRIDE_CONTROL=$<COMPILE_FEATURES:cxx_final,cxx_override>)
 
   add_executable(CompileFeaturesGenex2 genex_test.cpp)
-  target_compile_features(CompileFeaturesGenex2 PRIVATE cxx_constexpr)
+  target_compile_features(CompileFeaturesGenex2 PRIVATE cxx_static_assert)
   target_compile_definitions(CompileFeaturesGenex2 PRIVATE HAVE_OVERRIDE_CONTROL=$<COMPILE_FEATURES:cxx_final,cxx_override>)
 
-  add_library(noexcept_iface INTERFACE)
-  target_compile_features(noexcept_iface INTERFACE cxx_noexcept)
+  add_library(static_assert_iface INTERFACE)
+  target_compile_features(static_assert_iface INTERFACE cxx_static_assert)
   add_executable(CompileFeaturesGenex3 genex_test.cpp)
-  target_link_libraries(CompileFeaturesGenex3 PRIVATE noexcept_iface)
+  target_link_libraries(CompileFeaturesGenex3 PRIVATE static_assert_iface)
   target_compile_definitions(CompileFeaturesGenex3 PRIVATE HAVE_OVERRIDE_CONTROL=$<COMPILE_FEATURES:cxx_final,cxx_override>)
 endif()