Incorporate Martin's suggestions

Author: omjavaid

openmp/runtime/test/lit.cfg

@@ -137,7 +137,7 @@ if config.operating_system in ['Windows', 'Linux', 'FreeBSD', 'NetBSD', 'DragonF
 if config.operating_system in ['Linux']:
     config.available_features.add('hidden-helper')
 
-if config.compiler_frontend_variant == 'MSVC':
+if config.compiler_frontend_variant == 'MSVC' or config.compiler_simulate_id == 'MSVC':
     config.available_features.add("msvc")
 
 target_arch = getattr(config, 'target_arch', None)

openmp/runtime/test/lit.site.cfg.in

@@ -21,7 +21,8 @@ config.has_libatomic = @LIBOMP_HAVE_LIBATOMIC@
 config.is_standalone_build = @OPENMP_STANDALONE_BUILD@
 config.has_omit_frame_pointer_flag = @OPENMP_TEST_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS@
 config.target_arch = "@LIBOMP_ARCH@"
-config.compiler_frontend_variant="@CMAKE_C_COMPILER_FRONTEND_VARIANT@"
+config.compiler_frontend_variant = "@CMAKE_C_COMPILER_FRONTEND_VARIANT@"
+config.compiler_simulate_id = "@CMAKE_C_SIMULATE_ID@"
 
 # Let the main config do the real work.
 lit_config.load_config(config, "@LIBOMP_BASE_DIR@/test/lit.cfg")