test: attempt to fix windows builder

Author: compnerd

test/lit.cfg

@@ -991,7 +991,7 @@ elif run_os in ['windows-msvc']:
             ('%r -target %s %s %s %s' % (config.sil_opt, config.variant_triple,  \
                                          resource_dir_opt, mcp_opt,              \
                                          config.sil_test_options))
-    config.target_swift_symbol_graph_extract =                                   \
+    config.target_swift_symbolgraph_extract =                                    \
             ('%r -target %s %s' % (config.swift_symbolgraph_extract,             \
                                          config.variant_triple,                  \
                                          mcp_opt))