lit: move -ignore-module-source-info flag to swift_test_options

Author: nkcsgexi

test/lit.cfg

@@ -351,7 +351,10 @@ if test_options:
     config.swift_test_options += test_options
 
 config.swift_frontend_test_options = os.environ.get('SWIFT_FRONTEND_TEST_OPTIONS', '')
+config.swift_frontend_test_options += ' -ignore-module-source-info'
 config.swift_driver_test_options = os.environ.get('SWIFT_DRIVER_TEST_OPTIONS', '')
+config.swift_driver_test_options += ' -Xfrontend'
+config.swift_driver_test_options += ' -ignore-module-source-info'
 config.sil_test_options = os.environ.get('SIL_TEST_OPTIONS', '')
 
 clang_module_cache_path = make_path(config.swift_test_results_dir, "clang-module-cache")
@@ -878,7 +881,7 @@ if run_vendor == 'apple':
     config.target_sdk_name = xcrun_sdk_name
     config.target_ld = "%s ld -L%r" % (xcrun_prefix, make_path(test_resource_dir, config.target_sdk_name))
     config.target_swift_frontend = (
-        "%s -frontend %s -sdk %r %s %s -ignore-module-source-info" %
+        "%s -frontend %s -sdk %r %s %s" %
         (config.swiftc, target_options, config.variant_sdk,
          config.swift_test_options, config.swift_frontend_test_options))
     subst_target_swift_frontend_mock_sdk = (